Question 1

How do I convert Gap clothing size to Old Navy?

Accepted Answer

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

Question 2

Is a Gap M the same as a Old Navy 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.

Gap Letter	Step	Old Navy Letter
XS	0	XS
S	1	S
M	2	M
L	3	L
XL	4	XL
XXL	5	XXL

Gap to Old Navy clothing size conversion

Gap → Old Navy ladder (Letter)

Line fit matters more than brand