I really love this sweater. Sizing is consistent with the Love Live! dress shirt. A men's small fit a 5 foot 5 inch female body type. In US sizing I would compare it to a men's XS (maybe up to a small) and a women's medium. Sweater is light weight so comfortable indoors all year long.

I was unsure at first whether to order the men's or women's size shirts, but the men's came out to be a perfect fit for a 5'6" woman. Good proportions, sleeves hit slightly below the wrist, and no button pulls. It's a lighter weight than a regular dress shirt. By US sizing standards I would compare this to a men's XS and a women's size 4. I haven't seen a shirt that fits this well in about 10 years so I was beyond happy with my purchase.