Boden to Uniqlo clothing size

The short answer

Boden 2 is Uniqlo M by the two brands' own charts.

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

On 7 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.

Every Boden size read across to Uniqlo Japan sizing. US sizes on the left, Letter on the right.
Boden	Boden builds it for	Uniqlo Japan sizing, by chart	Same label	Uniqlo builds it for	Uniqlo also prints
2	bust 32 to 33 in, waist 25 to 26 in, hip 34 to 35 in	M	XS	bust 31.9 to 34.3 in, waist 25.6 to 28 in, hip 34.7 to 37 in	JP 9
4	bust 33.3 to 34 in, waist 26.3 to 27 in, hip 35.3 to 36 in	M	S	bust 31.9 to 34.3 in, waist 25.6 to 28 in, hip 34.7 to 37 in	JP 9
6	bust 34.3 to 35 in, waist 27.3 to 28 in, hip 36.3 to 37 in	L	S	bust 33.5 to 35.8 in, waist 27.2 to 29.5 in, hip 36.2 to 38.6 in	JP 11
8	bust 35.5 to 37 in, waist 28.5 to 30 in, hip 37.5 to 39 in	XL	M	bust 35.8 to 38.2 in, waist 29.5 to 31.9 in, hip 38.6 to 40.9 in	JP 13
10	bust 37.5 to 39 in, waist 30.5 to 32 in, hip 39.5 to 41 in	XXL	M	bust 38.2 to 40.6 in, waist 31.9 to 34.3 in, hip 40.9 to 43.3 in	JP 15
12	bust 39.5 to 41 in, waist 32.5 to 34 in, hip 41.5 to 43 in	XXL	L	bust 38.2 to 40.6 in, waist 31.9 to 34.3 in, hip 40.9 to 43.3 in	JP 15
14	bust 41.5 to 43 in, waist 34.5 to 36 in, hip 43.5 to 45 in	3XL	L	bust 40.6 to 42.9 in, waist 34.3 to 36.6 in, hip 43.3 to 45.7 in	JP 17
16	bust 43.5 to 45 in, waist 36.5 to 38 in, hip 45.5 to 47 in	3XL	XL	bust 40.6 to 42.9 in, waist 34.3 to 36.6 in, hip 43.3 to 45.7 in	JP 17
18	bust 45.5 to 47.5 in, waist 38.5 to 40.5 in, hip 47.5 to 49.5 in	not made	XL	not published	not published

Tinted rows change label or sit between two sizes. 1 sizes have no counterpart on the Uniqlo chart. 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

Boden size guide, read on 2026-09-18.
Uniqlo Japan sizing size guide, read on 2026-09-25. Uniqlo on TrueToSize

Uniqlo to Boden