Oysho to Old Navy leggings size
The short answer
Oysho S is Old Navy XS or S by the two brands' own charts. 4 of 7 Oysho sizes land on a different label at Old Navy.
Both brands publish the body waist each size is cut for, so every row matches a waist, not a tag.
| Oysho | Oysho builds it for | Old Navy, by chart | Same label | Old Navy builds it for | Old Navy also prints |
|---|---|---|---|---|---|
| XXS | waist 24 to 25 in, hip 36 to 37 in | XXS | XXS | waist 24 in, hip 34.5 in | US numeric 00 |
| XS | waist 25 to 26 in, hip 37 to 38 in | XS | XS | waist 25 to 26 in, hip 35.5 to 36.5 in | US numeric 0-2 |
| S | waist 26 to 27 in, hip 38 to 39 in | XS or S | S | waist 25 to 26 in, hip 35.5 to 36.5 in | US numeric 0-2 |
| M | waist 27 to 29 in, hip 39 to 41 in | S | M | waist 27 to 28 in, hip 37.5 to 38.5 in | US numeric 4-6 |
| L | waist 30 to 33 in, hip 42 to 45 in | L | L | waist 31.5 to 33.5 in, hip 42 to 44 in | US numeric 12-14 |
| XL | waist 33 to 35 in, hip 45 to 47 in | L | XL | waist 31.5 to 33.5 in, hip 42 to 44 in | US numeric 12-14 |
| XXL | waist 36 to 39 in, hip 48 to 51 in | XL | XXL | waist 36.3 to 39 in, hip 46.5 to 49 in | US numeric 16-18 |
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
- Oysho size guide, read on 2026-09-18. Oysho on TrueToSize
- Old Navy size guide, read on 2026-09-17. Old Navy on TrueToSize