Goldwin to Gap clothing size

The short answer

Goldwin 1 is Gap 00 by the two brands' own charts. 5 of 5 Goldwin sizes land on a different label at Gap.

Both brands publish the body bust each size is cut for, so every row matches a bust, not a letter or a number.

Every Goldwin Japan sizing size read across to Gap. US sizes on the left, US on the right.
Goldwin Japan sizing	Goldwin builds it for	Gap, by chart	Same label	Gap builds it for	Gap also prints
1	bust 30.3 to 32.7 in, waist 22.8 to 25.2 in, hip 32.7 to 35 in	00	not published	bust 31.3 in, waist 24.8 in, hip 34.3 in	Letter XXS
2	bust 31.5 to 33.9 in, waist 24 to 26.4 in, hip 34.3 to 36.6 in	0 or 2	2	bust 32.3 in, waist 25.5 in, hip 35.3 in	Letter XS
3	bust 32.7 to 35 in, waist 25.2 to 27.6 in, hip 35.8 to 38.2 in	4 or 2	not published	bust 34.3 in, waist 27.5 in, hip 37.3 in	Letter S
4	bust 33.9 to 36.2 in, waist 26.4 to 28.7 in, hip 37.4 to 39.8 in	6	4	bust 35.3 in, waist 28.5 in, hip 38.3 in	Letter S
5	bust 35 to 37.4 in, waist 27.6 to 29.9 in, hip 39 to 41.3 in	8	not published	bust 36.3 in, waist 29.5 in, hip 39.3 in	Letter M

Tinted rows change label or sit between two sizes. Read from the two charts only; no formula and no averaging.

What wearers say

Charts describe a garment, not a fit. We do not collect fit reports for this category yet, so this table is the two brands' own claims and nothing more.

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Sources

Goldwin Japan sizing size guide, read on 2026-09-25.
Gap size guide, read on 2026-09-18. Gap on TrueToSize

Gap to Goldwin