Gap to Ksubi jeans size
The short answer
Gap 000 is Ksubi 1 or 2 by the two brands' own charts. 9 of 10 Gap sizes land on a different label at Ksubi.
Both brands publish the body waist each size is cut for, so every row matches a waist, not a tag.
On 3 sizes the charts land two or more sizes from the same label. Brands do not measure the body the same way, so on those rows treat the chart answer and the same label as the two ends of a range.
| Gap | Gap builds it for | Ksubi, by chart | Same label | Ksubi builds it for | Ksubi also prints |
|---|---|---|---|---|---|
| 000 | waist 24 in, hip 33.3 in | 1 or 2 | 0 | waist 23.5 in, hip 34 in | Waist size 23 · Letter XXS |
| 000 | waist 24 in, hip 33.3 in | 1 or 2 | 0 | waist 23.5 in, hip 34 in | Waist size 23 · Letter XXS |
| 000 | waist 24 in, hip 33.3 in | 1 or 2 | 0 | waist 23.5 in, hip 34 in | Waist size 23 · Letter XXS |
| 2 | waist 26.5 in, hip 36.3 in | 4 | 2 | waist 26.5 in, hip 37 in | Waist size 26 · Letter S |
| 4 | waist 27.5 in, hip 37.3 in | 5 | 4 | waist 27.5 in, hip 38 in | Waist size 27 · Letter S |
| 6 | waist 28.5 in, hip 38.3 in | 6 | 6 | waist 28.5 in, hip 39 in | Waist size 28 · Letter M |
| 8 | waist 29.5 in, hip 39.3 in | 7 | 8 | waist 29.5 in, hip 40 in | Waist size 29 · Letter M |
| 10 | waist 30.5 in, hip 40.3 in | 8 | 10 | waist 30.5 in, hip 41 in | Waist size 30 · Letter L |
| 12 | waist 32 in, hip 41.8 in | 9 or 10 | 12 | waist 31.5 in, hip 42 in | Waist size 31 · Letter L |
| 14 | waist 33.5 in, hip 43.3 in | 11 | not published | waist 33.5 in, hip 44 in | Waist size 33 · Letter XL |
| 16 | waist 35.5 in, hip 45.3 in | not made | not published | not published | not published |
| 18 | waist 37.5 in, hip 47.3 in | not made | not published | not published | not published |
| 20 | waist 39.5 in, hip 49.3 in | not made | not published | not published | not published |
| 22 | waist 41.5 in, hip 51.3 in | not made | not published | not published | not published |
What wearers say
Charts describe a garment. People who own both brands describe a fit, and their answer ranks above this table once five of them stand behind it. Pick your size in the converter to see whether there are enough yet.
Sources
- Gap size guide, read on 2026-09-17. Gap on TrueToSize
- Ksubi size guide, read on 2026-09-18.