Ksubi to Reformation jeans size
The short answer
Ksubi 8 is Reformation 29 by the two brands' own charts.
Both brands publish the body waist each size is cut for, so every row matches a waist, not a tag.
On 2 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.
| Ksubi | Ksubi builds it for | Reformation, by chart | Same label | Reformation builds it for | Reformation also prints |
|---|---|---|---|---|---|
| 0 | waist 22.5 in, hip 33 in | not made | not published | not published | not published |
| 1 | waist 23.5 in, hip 34 in | 23 | 23 | waist 23.5 in, hip 34 in | not published |
| 2 | waist 24.5 in, hip 35 in | 24 | 24 | waist 24.5 in, hip 35 in | not published |
| 3 | waist 25.5 in, hip 36 in | 25 | 25 | waist 25.5 in, hip 36 in | not published |
| 4 | waist 26.5 in, hip 37 in | 26 | 26 | waist 26.5 in, hip 37 in | not published |
| 5 | waist 27.5 in, hip 38 in | 27 | 27 | waist 27.5 in, hip 38 in | not published |
| 6 | waist 28.5 in, hip 39 in | 28 | 28 | waist 28.5 in, hip 39 in | not published |
| 7 | waist 29.5 in, hip 40 in | 29 | 29 | waist 30 in, hip 40.5 in | not published |
| 8 | waist 30.5 in, hip 41 in | 29 | 30 | waist 30 in, hip 40.5 in | not published |
| 9 | waist 31.5 in, hip 42 in | 30 | 31 | waist 31.5 in, hip 42 in | not published |
| 10 | waist 32.5 in, hip 43 in | 31 or 30 | 32 | waist 33.3 in, hip 43.8 in | not published |
| 11 | waist 33.5 in, hip 44 in | 31 | 33 | waist 33.3 in, hip 43.8 in | not published |
| 12 | waist 34.5 in, hip 45 in | 31 | 34 | waist 33.3 in, hip 43.8 in | 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
- Ksubi size guide, read on 2026-09-18.
- Reformation size guide, read on 2026-09-18. Reformation on TrueToSize