Airwaily
eSIM comparisons
Cheapest & Best Bulgaria eSIMs: Top 9 Providers Compared
Nine eSIM providers compared for Bulgaria in USD. Airwaily's 1 GB 30-day plan is $0.22; MobiMatter's 30 GB plan is $11.99 and GigSky's 50 GB plan is $27.91. See the ten tables.
The dated comparison tables below reflect the observation date recorded for each figure and are not a guarantee of current pricing.
How the Bulgaria eSIM comparison works
I compared nine eSIM providers for Bulgaria to see how their fixed-allowance data plans line up on price. Airwaily publishes this comparison and sells one of the products in it, so its plans appear alongside Airalo, Saily, Nomad, MobiMatter, Ubigi, Jetpac, Yesim and GigSky. Every plan here is data-only, with no local phone number and no ordinary calls or SMS. Allowance and validity work together: a 1 GB plan valid for 30 days is not the same product as a 1 GB plan valid for 7 days. The ten tables below group offers by allowance and by trip length, and the percentages beneath each table describe the listed USD prices.
1 GB eSIM plans for Bulgaria
The lowest 1 GB offer is Airwaily's 30-day plan at $0.22, a promotional price down from $0.76. Jetpac has no 1 GB plan in this set, so eight providers were eligible.
| Provider | Allowance | Validity | Listed price |
|---|---|---|---|
| AirwailyCountry-specific Bulgaria plan | 1 GB | 30 days | $0.22 Regular $0.76 Promo †Offer conditionsListed sale price · USD cart minimum: $1.00 |
| Airalo | 1 GB | 3 days | $3.60 Regular $4.00 Promo †Offer conditionsRecorded code: ESIMDB10 · Excluded methods: Airmoney, Apple Pay, Google Pay, PayPal · No stacking · Other eligibility unconfirmed |
| Saily | 1 GB | 7 days | $1.79 Regular $1.99 Promo †Offer conditionsRecorded code: ESIMDB10 · First purchase only · No stacking · Other eligibility unconfirmed |
| Nomad | 1 GB | 7 days | $4.50 |
| MobiMatterMulti-country · includes Bulgaria | 1 GB | 14 days | $3.49 |
| UbigiMulti-country · includes Bulgaria | 1 GB | 30 days | $7.20 Regular $8.00 Promo †Offer conditionsRecorded code: ESIMDB10 · One use per customer · Other eligibility unconfirmed |
| Jetpac | — | — | No matching offer |
| Yesim | 1 GB | 30 days | $2.23 Regular $2.79 Promo †Offer conditionsRecorded code: ESIMDB20 · First purchase only · Other eligibility unconfirmed |
| GigSky | 1 GB | 7 days | $2.39 Regular $2.99 Promo †Offer conditionsRecorded code: GSKYES20 · One use per customer · No stacking · Other eligibility unconfirmed |
Airwaily's 1 GB plan is 90.1% cheaper than Yesim's 1 GB 30-day plan at $2.23 and 96.9% cheaper than Ubigi's 1 GB 30-day multi-country plan at $7.20. Against Saily's 1 GB 7-day plan at $1.79 the saving is 87.7%, though the durations differ, so that one is an upfront-price difference.
5 GB eSIM plans for Bulgaria
Airwaily's 5 GB 30-day plan at $2.36 is the lowest 5 GB price and not a promotional rate. The next 5 GB offers are Jetpac's $2.99 and GigSky's $4.63.
| Provider | Allowance | Validity | Listed price |
|---|---|---|---|
| AirwailyCountry-specific Bulgaria plan | 5 GB | 30 days | $2.36 |
| Airalo | 5 GB | 7 days | $5.40 Regular $6.00 Promo †Offer conditionsRecorded code: ESIMDB10 · Excluded methods: Airmoney, Apple Pay, Google Pay, PayPal · No stacking · Other eligibility unconfirmed |
| Saily | 5 GB | 30 days | $6.29 Regular $6.99 Promo †Offer conditionsRecorded code: ESIMDB10 · First purchase only · No stacking · Other eligibility unconfirmed |
| Nomad | 5 GB | 30 days | $12.50 |
| MobiMatterMulti-country · includes Bulgaria | 5 GB | 30 days | $6.49 |
| Ubigi | — | — | No matching offer |
| Jetpac | 5 GB | 30 days | $2.99 Regular $6.99 Promo †Offer conditionsRecorded code: ESIMDB4OFF · One use per customer · Other eligibility unconfirmed |
| Yesim | 5 GB | 30 days | $8.57 Regular $10.72 Promo †Offer conditionsRecorded code: ESIMDB20 · First purchase only · Other eligibility unconfirmed |
| GigSky | 5 GB | 30 days | $4.63 Regular $5.79 Promo †Offer conditionsRecorded code: GSKYES20 · One use per customer · No stacking · Other eligibility unconfirmed |
For 5 GB over 30 days, Airwaily's plan is 62.5% cheaper than Saily's $6.29 and 49% cheaper than GigSky's $4.63; against Nomad's $12.50 it is 81.1% cheaper. Every comparison in this section has the same allowance and the same validity.
10 GB eSIM plans for Bulgaria
Airwaily's 10 GB 30-day plan at $4.94 is the lowest 10 GB price and not a promotional rate. Ubigi's 10 GB plan costs $7.20 but lasts only 7 days, and Jetpac's 10 GB 30-day plan is $8.00.
| Provider | Allowance | Validity | Listed price |
|---|---|---|---|
| AirwailyCountry-specific Bulgaria plan | 10 GB | 30 days | $4.94 |
| Airalo | 10 GB | 7 days | $9.90 Regular $11.00 Promo †Offer conditionsRecorded code: ESIMDB10 · Excluded methods: Airmoney, Apple Pay, Google Pay, PayPal · No stacking · Other eligibility unconfirmed |
| Saily | 10 GB | 30 days | $10.79 Regular $11.99 Promo †Offer conditionsRecorded code: ESIMDB10 · First purchase only · No stacking · Other eligibility unconfirmed |
| Nomad | 10 GB | 30 days | $16.00 |
| MobiMatterMulti-country · includes Bulgaria | 10 GB | 30 days | $10.49 |
| Ubigi | 10 GB | 7 days | $7.20 Regular $8.00 Promo †Offer conditionsRecorded code: ESIMDB10 · One use per customer · Other eligibility unconfirmed |
| Jetpac | 10 GB | 30 days | $8.00 Regular $12.00 Promo †Offer conditionsRecorded code: ESIMDB4OFF · One use per customer · Other eligibility unconfirmed |
| Yesim | 10 GB | 30 days | $14.29 Regular $17.86 Promo †Offer conditionsRecorded code: ESIMDB20 · First purchase only · Other eligibility unconfirmed |
| GigSky | 10 GB | 30 days | $8.23 Regular $10.29 Promo †Offer conditionsRecorded code: GSKYES20 · One use per customer · No stacking · Other eligibility unconfirmed |
On 10 GB over 30 days, Airwaily's $4.94 is 54.2% less than Saily's $10.79 and 40% less than GigSky's $8.23. All three plans in this section share the same 10 GB allowance and 30-day validity.
15 GB and larger eSIM plans for Bulgaria
This is a 15 GB minimum list, so the package sizes differ. Airwaily's 20 GB 30-day plan at $10.36 is the lowest, and Jetpac's 15 GB 30-day plan at $12.99 is next.
| Provider | Allowance | Validity | Listed price |
|---|---|---|---|
| AirwailyCountry-specific Bulgaria plan | 20 GB | 30 days | $10.36 |
| Airalo | 20 GB | 15 days | $17.10 Regular $19.00 Promo †Offer conditionsRecorded code: ESIMDB10 · Excluded methods: Airmoney, Apple Pay, Google Pay, PayPal · No stacking · Other eligibility unconfirmed |
| Saily | 20 GB | 30 days | $17.99 Regular $19.99 Promo †Offer conditionsRecorded code: ESIMDB10 · First purchase only · No stacking · Other eligibility unconfirmed |
| Nomad | 20 GB | 30 days | $20.00 |
| MobiMatter | 30 GB | 30 days | $11.99 |
| Ubigi | 25 GB | 30 days | $17.10 Regular $19.00 Promo †Offer conditionsRecorded code: ESIMDB10 · One use per customer · Other eligibility unconfirmed |
| Jetpac | 15 GB | 30 days | $12.99 Regular $16.99 Promo †Offer conditionsRecorded code: ESIMDB4OFF · One use per customer · Other eligibility unconfirmed |
| Yesim | 20 GB | 30 days | $19.65 Regular $24.56 Promo †Offer conditionsRecorded code: ESIMDB20 · First purchase only · Other eligibility unconfirmed |
| GigSky | 20 GB | 90 days | $14.39 Regular $17.99 Promo †Offer conditionsRecorded code: GSKYES20 · One use per customer · No stacking · Other eligibility unconfirmed |
Airwaily's 20 GB 30-day plan is 42.4% cheaper than Saily's 20 GB 30-day plan at $17.99 and 48.2% cheaper than Nomad's 20 GB 30-day plan at $20.00. Against Yesim's 20 GB 30-day plan at $19.65, the saving is 47.3%.
30 GB eSIM plans for Bulgaria
MobiMatter's 30 GB 30-day plan at $11.99 is the cheapest 30 GB offer, ahead of Airwaily's 30 GB 60-day plan at $18.45. Airalo and GigSky have no 30 GB entry here.
| Provider | Allowance | Validity | Listed price |
|---|---|---|---|
| AirwailyCountry-specific Bulgaria plan | 30 GB | 60 days | $18.45 |
| Airalo | — | — | No matching offer |
| SailyMulti-country · includes Bulgaria | 30 GB | 30 days | $53.99 Regular $59.99 Promo †Offer conditionsRecorded code: ESIMDB10 · First purchase only · No stacking · Other eligibility unconfirmed |
| NomadMulti-country · includes Bulgaria | 30 GB | 365 days | $79.00 |
| MobiMatter | 30 GB | 30 days | $11.99 |
| Ubigi | 30 GB | 15 days | $28.80 Regular $32.00 Promo †Offer conditionsRecorded code: ESIMDB10 · One use per customer · Other eligibility unconfirmed |
| Jetpac | 30 GB | 30 days | $25.99 Regular $29.99 Promo †Offer conditionsRecorded code: ESIMDB4OFF · One use per customer · Other eligibility unconfirmed |
| Yesim | 30 GB | 30 days | $25.01 Regular $31.26 Promo †Offer conditionsRecorded code: ESIMDB20 · First purchase only · Other eligibility unconfirmed |
| GigSky | — | — | No matching offer |
MobiMatter's 30 GB 30-day plan is 35% cheaper than Airwaily's 30 GB 60-day plan, which runs twice as long, so the gap is an upfront-price difference. Airwaily's 60-day plan is 65.8% cheaper than Saily's 30 GB 30-day plan at $53.99 and 76.6% cheaper than Nomad's 30 GB 365-day plan at $79.00.
50 GB eSIM plans for Bulgaria
GigSky's 50 GB 180-day plan at $27.91 is the cheapest 50 GB offer, just ahead of Airwaily's 50 GB 180-day plan at $28.69. Yesim has no 50 GB entry in this set.
| Provider | Allowance | Validity | Listed price |
|---|---|---|---|
| AirwailyCountry-specific Bulgaria plan | 50 GB | 180 days | $28.69 |
| Airalo | 50 GB | 30 days | $32.40 Regular $36.00 Promo †Offer conditionsRecorded code: ESIMDB10 · Excluded methods: Airmoney, Apple Pay, Google Pay, PayPal · No stacking · Other eligibility unconfirmed |
| SailyMulti-country · includes Bulgaria | 50 GB | 90 days | $86.39 Regular $95.99 Promo †Offer conditionsRecorded code: ESIMDB10 · First purchase only · No stacking · Other eligibility unconfirmed |
| NomadMulti-country · includes Bulgaria | 50 GB | 30 days | $35.00 |
| MobiMatterMulti-country · includes Bulgaria | 50 GB | 60 days | $38.99 |
| Ubigi | 50 GB | 30 days | $30.60 Regular $34.00 Promo †Offer conditionsRecorded code: ESIMDB10 · One use per customer · Other eligibility unconfirmed |
| JetpacMulti-country · includes Bulgaria | 50 GB | 365 days | $245.00 Regular $249.00 Promo †Offer conditionsRecorded code: ESIMDB4OFF · One use per customer · Other eligibility unconfirmed |
| Yesim | — | — | No matching offer |
| GigSky | 50 GB | 180 days | $27.91 Regular $34.89 Promo †Offer conditionsRecorded code: GSKYES20 · One use per customer · No stacking · Other eligibility unconfirmed |
GigSky's 50 GB 180-day plan is 2.7% cheaper than Airwaily's plan of the same size and validity, so Airwaily loses the 50 GB table by a narrow margin. Airwaily's 50 GB 180-day plan is 66.8% cheaper than Saily's 50 GB 90-day plan at $86.39 and 11.5% cheaper than Airalo's 50 GB 30-day plan at $32.40.
Bulgaria eSIM plans for a week
For a week or more, Airwaily's 1 GB 30-day plan at $0.22 is the lowest, even though its validity runs longer than the seven days this table requires. Jetpac's 3 GB 7-day plan is $1.00.
| Provider | Allowance | Validity | Listed price |
|---|---|---|---|
| AirwailyCountry-specific Bulgaria plan | 1 GB | 30 days | $0.22 Regular $0.76 Promo †Offer conditionsListed sale price · USD cart minimum: $1.00 |
| Airalo | 3 GB | 7 days | $4.50 Regular $5.00 Promo †Offer conditionsRecorded code: ESIMDB10 · Excluded methods: Airmoney, Apple Pay, Google Pay, PayPal · No stacking · Other eligibility unconfirmed |
| Saily | 1 GB | 7 days | $1.79 Regular $1.99 Promo †Offer conditionsRecorded code: ESIMDB10 · First purchase only · No stacking · Other eligibility unconfirmed |
| Nomad | 1 GB | 7 days | $4.50 |
| MobiMatterMulti-country · includes Bulgaria | 2 GB | 15 days | $3.49 |
| Ubigi | 3 GB | 15 days | $3.60 Regular $4.00 Promo †Offer conditionsRecorded code: ESIMDB10 · One use per customer · Other eligibility unconfirmed |
| Jetpac | 3 GB | 7 days | $1.00 Regular $5.00 Promo †Offer conditionsRecorded code: ESIMDB4OFF · One use per customer · Other eligibility unconfirmed |
| Yesim | 1 GB | 30 days | $2.23 Regular $2.79 Promo †Offer conditionsRecorded code: ESIMDB20 · First purchase only · Other eligibility unconfirmed |
| GigSky | 1 GB | 7 days | $2.39 Regular $2.99 Promo †Offer conditionsRecorded code: GSKYES20 · One use per customer · No stacking · Other eligibility unconfirmed |
Airwaily's 1 GB 30-day plan is 90.1% cheaper than Yesim's 1 GB 30-day plan at $2.23 and 90.8% cheaper than GigSky's 1 GB 7-day plan at $2.39. Against Saily's 1 GB 7-day plan at $1.79 the saving is 87.7%, and there the durations differ, so the allowance matches but the validity does not.
Bulgaria eSIM plans for two weeks
Airwaily's 5 GB 30-day plan at $2.36 is the cheapest offer that covers two weeks, with Jetpac's 5 GB 30-day plan at $2.99 next. Ubigi's 10 GB 30-day plan at $9.90 is the larger option.
| Provider | Allowance | Validity | Listed price |
|---|---|---|---|
| AirwailyCountry-specific Bulgaria plan | 5 GB | 30 days | $2.36 |
| Airalo | 5 GB | 15 days | $5.85 Regular $6.50 Promo †Offer conditionsRecorded code: ESIMDB10 · Excluded methods: Airmoney, Apple Pay, Google Pay, PayPal · No stacking · Other eligibility unconfirmed |
| Saily | 5 GB | 30 days | $6.29 Regular $6.99 Promo †Offer conditionsRecorded code: ESIMDB10 · First purchase only · No stacking · Other eligibility unconfirmed |
| Nomad | 5 GB | 30 days | $12.50 |
| MobiMatterMulti-country · includes Bulgaria | 5 GB | 30 days | $6.49 |
| Ubigi | 10 GB | 30 days | $9.90 Regular $11.00 Promo †Offer conditionsRecorded code: ESIMDB10 · One use per customer · Other eligibility unconfirmed |
| Jetpac | 5 GB | 30 days | $2.99 Regular $6.99 Promo †Offer conditionsRecorded code: ESIMDB4OFF · One use per customer · Other eligibility unconfirmed |
| Yesim | 5 GB | 30 days | $8.57 Regular $10.72 Promo †Offer conditionsRecorded code: ESIMDB20 · First purchase only · Other eligibility unconfirmed |
| GigSky | 5 GB | 30 days | $4.63 Regular $5.79 Promo †Offer conditionsRecorded code: GSKYES20 · One use per customer · No stacking · Other eligibility unconfirmed |
Airwaily's 5 GB 30-day plan is 62.5% cheaper than Saily's 5 GB 30-day plan at $6.29 and 21.1% cheaper than Jetpac's 5 GB 30-day plan at $2.99. Both pairs share the same allowance and validity, so these are like-for-like upfront differences.
Bulgaria eSIM plans for one month
For a month, Airwaily's 10 GB 30-day plan at $4.94 leads, with Jetpac's 10 GB 30-day plan at $8.00 and GigSky's at $8.23 next. Airalo's and Ubigi's 10 GB plans last 7 days and miss the 30-day minimum.
| Provider | Allowance | Validity | Listed price |
|---|---|---|---|
| AirwailyCountry-specific Bulgaria plan | 10 GB | 30 days | $4.94 |
| Airalo | 10 GB | 30 days | $10.80 Regular $12.00 Promo †Offer conditionsRecorded code: ESIMDB10 · Excluded methods: Airmoney, Apple Pay, Google Pay, PayPal · No stacking · Other eligibility unconfirmed |
| Saily | 10 GB | 30 days | $10.79 Regular $11.99 Promo †Offer conditionsRecorded code: ESIMDB10 · First purchase only · No stacking · Other eligibility unconfirmed |
| Nomad | 10 GB | 30 days | $16.00 |
| MobiMatterMulti-country · includes Bulgaria | 10 GB | 30 days | $10.49 |
| Ubigi | 10 GB | 30 days | $9.90 Regular $11.00 Promo †Offer conditionsRecorded code: ESIMDB10 · One use per customer · Other eligibility unconfirmed |
| Jetpac | 10 GB | 30 days | $8.00 Regular $12.00 Promo †Offer conditionsRecorded code: ESIMDB4OFF · One use per customer · Other eligibility unconfirmed |
| Yesim | 10 GB | 30 days | $14.29 Regular $17.86 Promo †Offer conditionsRecorded code: ESIMDB20 · First purchase only · Other eligibility unconfirmed |
| GigSky | 10 GB | 30 days | $8.23 Regular $10.29 Promo †Offer conditionsRecorded code: GSKYES20 · One use per customer · No stacking · Other eligibility unconfirmed |
Airwaily's 10 GB 30-day plan is 69.1% cheaper than Nomad's 10 GB 30-day plan at $16.00 and 54.2% cheaper than Saily's 10 GB 30-day plan at $10.79. All three plans are 10 GB with 30 days of validity, so these are like-for-like upfront differences.
Bulgaria eSIM plans for two months
Two months or more opens up the 30 GB and 50 GB plans. Airwaily's 30 GB 60-day plan at $18.45 is the lowest upfront price, its 30 GB 180-day plan is $20.25, and GigSky's 50 GB 180-day plan is $27.91.
| Provider | Allowance | Validity | Listed price |
|---|---|---|---|
| AirwailyCountry-specific Bulgaria plan | 30 GB | 60 days | $18.45 |
| AiraloMulti-country · includes Bulgaria | 50 GB | 90 days | $90.00 Regular $100.00 Promo †Offer conditionsRecorded code: ESIMDB10 · Excluded methods: Airmoney, Apple Pay, Google Pay, PayPal · No stacking · Other eligibility unconfirmed |
| SailyMulti-country · includes Bulgaria | 50 GB | 90 days | $86.39 Regular $95.99 Promo †Offer conditionsRecorded code: ESIMDB10 · First purchase only · No stacking · Other eligibility unconfirmed |
| NomadMulti-country · includes Bulgaria | 30 GB | 365 days | $79.00 |
| MobiMatter | 100 GB | 180 days | $29.99 |
| UbigiMulti-country · includes Bulgaria | 50 GB | 180 days | $62.10 Regular $69.00 Promo †Offer conditionsRecorded code: ESIMDB10 · One use per customer · Other eligibility unconfirmed |
| JetpacMulti-country · includes Bulgaria | 30 GB | 180 days | $95.99 Regular $99.99 Promo †Offer conditionsRecorded code: ESIMDB4OFF · One use per customer · Other eligibility unconfirmed |
| YesimMulti-country · includes Bulgaria | 40 GB | 365 days | $61.62 Regular $77.03 Promo †Offer conditionsRecorded code: ESIMDB20 · First purchase only · Other eligibility unconfirmed |
| GigSky | 50 GB | 180 days | $27.91 Regular $34.89 Promo †Offer conditionsRecorded code: GSKYES20 · One use per customer · No stacking · Other eligibility unconfirmed |
Airwaily's 30 GB 60-day plan is 76.6% cheaper than Nomad's 30 GB 365-day plan at $79.00 and 80.8% cheaper than Jetpac's 30 GB 180-day plan at $95.99. Against Saily's 50 GB 90-day plan at $86.39, Airwaily's 30 GB plan costs 78.6% less, although the allowance and validity differ. GigSky's 50 GB 180-day plan at $27.91 undercuts Airwaily's 50 GB 180-day plan at $28.69, so the 50 GB tier stays a GigSky win.
Which Bulgaria eSIM should you buy?
Airwaily wins the 1 GB, 5 GB, 10 GB and 20 GB tables, plus the week, two-week and one-month cohorts, with prices from $0.22 to $10.36. Its weak spots are the larger tiers: MobiMatter's 30 GB 30-day plan is $11.99, and GigSky's 50 GB 180-day plan is $0.78 below Airwaily's. Airwaily's edge is strongest on small allowances and short trips, while the 30 GB and 50 GB choices belong to the rivals.
How to read these prices
The prices are USD figures recorded on 11 November 2026. Promotions already appear in the amounts shown, so the listed discount is not applied twice. The comparison covers nine selected providers and fixed-allowance plans only, and each table pairs offers with equal data and validity where the like-for-like label applies. Some competitor amounts were converted from the provider's own currency, and checkout totals, taxes and fees were not verified.
Frequently asked questions
Which eSIM for Bulgaria has the lowest paid price?
Airwaily's 1 GB 30-day plan at $0.22 is the lowest paid listing, a promotional price cut from $0.76. It covers 30 days, not 1 day, and its allowance is the smallest in the comparison. For more data, Airwaily's 5 GB 30-day plan is $2.36 and its 10 GB 30-day plan is $4.94. My recommendations rest on the listed USD prices only; the comparison does not record whether top up is available on a plan, and it covers fixed-allowance data plans rather than daily bundles.
Which 1 GB Bulgaria eSIM is cheapest?
Airwaily's 1 GB 30-day plan is the cheapest 1 GB offer at $0.22, a promotional price cut from $0.76. Jetpac has no 1 GB plan in this comparison, so eight providers were eligible. If you need one day of coverage, the 30-day validity covers it; there is no separate 1 day bundle in this comparison.
Which 3 GB Bulgaria eSIM is cheapest?
Jetpac's 3 GB 7-day plan at $1.00 is the lowest 3 GB listing, a promotional price down from $5.00. Airwaily's 3 GB plan costs $1.51 for 15 days and $1.63 for 30 days, so it costs more but lasts longer. If your stay runs past a week, the longer validity is worth the extra.
What does the cheapest 5 GB Bulgaria eSIM cost?
Airwaily's 5 GB 30-day plan is the cheapest 5 GB offer at $2.36 and is not a promotional rate. Jetpac's 5 GB 30-day plan is $2.99, and the other 5 GB offers run from $4.63 to $12.50. The 30-day validity covers 14 days or 2 weeks, and longer.
Which 10 GB Bulgaria eSIM is cheapest?
Airwaily's 10 GB 30-day plan is the cheapest 10 GB offer at $4.94, a non-promotional price. Jetpac's 10 GB 30-day plan is $8.00 and GigSky's is $8.23, while Ubigi's 10 GB plan costs $7.20 but lasts only 7 days. That shorter validity means Ubigi's plan covers less time for a higher price.
Which 20 GB Bulgaria eSIM is cheapest?
Airwaily's 20 GB 30-day plan is the cheapest 20 GB offer at $10.36 with no promotion applied. GigSky's 20 GB plan costs $14.39 but lasts 90 days, and Airalo's 20 GB 15-day plan costs $17.10. Use the 20 GB table rather than the 15 GB minimum table when you need exactly 20 GB.
