Question 1

How do I convert COS clothing size to ASOS?

Accepted Answer

Match by the same size system (letter or waist), then adjust for each line’s fit offset. Example: COS 32 ≈ ASOS 32 on the shared ladder (draft). Cut still matters more than the label.

Question 2

Is a COS M the same as a ASOS M?

Accepted Answer

Not always. Letter and waist labels map differently across brands, and slim vs straight cuts change how a size feels. Use line guides, not brand averages alone.

COS Waist (W)	Step	ASOS Waist (W)
28	0	28
29	1	29
30	2	30
31	3	31
32	4	32
33	5	33
34	6	34
36	7	36
38	8	38

COS to ASOS clothing size conversion

COS → ASOS ladder (Waist (W))

Line fit matters more than brand