Good American to Reformation jeans size
The short answer
Good American 12 is Reformation 31 or 30 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.
| Good American | Good American builds it for | Reformation, by chart | Same label | Reformation builds it for | Reformation also prints |
|---|---|---|---|---|---|
| 00 | waist 24.5 in, hip 36 in | 24 | not published | waist 24.5 in, hip 35 in | not published |
| 00 | waist 24.5 in, hip 36 in | 24 | not published | waist 24.5 in, hip 35 in | not published |
| 2 | waist 26.5 in, hip 38 in | 26 | not published | waist 26.5 in, hip 37 in | not published |
| 4 | waist 27.5 in, hip 39 in | 27 | not published | waist 27.5 in, hip 38 in | not published |
| 6 | waist 28.5 in, hip 40 in | 28 | not published | waist 28.5 in, hip 39 in | not published |
| 8 | waist 29.5 in, hip 41 in | 29 | not published | waist 30 in, hip 40.5 in | not published |
| 10 | waist 31 in, hip 42.5 in | 30 | not published | waist 31.5 in, hip 42 in | not published |
| 12 | waist 32.5 in, hip 44 in | 31 or 30 | not published | waist 33.3 in, hip 43.8 in | not published |
| 14 | waist 34 in, hip 45.5 in | 31 | not published | waist 33.3 in, hip 43.8 in | not published |
| 15 Plus | waist 37 in, hip 48 in | 32 | not published | waist 38.5 in, hip 49 in | not published |
| 16 Plus | waist 39 in, hip 50 in | 33 | not published | waist 39 in, hip 50 in | not published |
| 18 Plus | waist 41 in, hip 52 in | 35 | not published | waist 41 in, hip 52 in | not published |
| 20 Plus | waist 43 in, hip 54 in | 36 or 38 | not published | waist 42 in, hip 53 in | not published |
| 22 Plus | waist 45 in, hip 56 in | 38 | not published | waist 44 in, hip 55 in | not published |
| 24 Plus | waist 47 in, hip 58 in | not made | not published | not published | not published |
| 26 Plus | waist 49 in, hip 60 in | not made | not published | not published | not published |
| 28 Plus | waist 51 in, hip 62 in | not made | not published | not published | not published |
| 30 Plus | waist 53 in, hip 64 in | not made | not published | not published | not published |
| 32 Plus | waist 55 in, hip 66 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
- Good American size guide, read on 2026-09-18. Good American on TrueToSize
- Reformation size guide, read on 2026-09-18. Reformation on TrueToSize