My sweatshirts are classically cut and unisex.

I've estimated UK women's sizes here as best I can following feedback, however, sizing is tricky isn't it!? A 12 in Zara is a 16 in H&M and oversized to some will feel true to size to others.

To be 100% sure please lay one of your favourite sweatshirts flat and measure in cm as follows:

A - chest (armpit to armpit)
B - length (neck to hem)
C - sleeve (shoulder to cuff)

 

Size Approx UK Size A  B C
XS 6-8 48 65 62
S 8-10 50 67 64
M 10-12 53 71 65
L 14 56 73 67
XL 16 59 75 68
XXL 18-20 62 77 70
3XL 22 65 80 70