Oh, these are the codes of Li Lang Clothing Company. A refers to the regular version, that is, the loose version. Y refers to the fitted version, which is relatively slim, S refers to the creative version, slim version, and SA and SB refer to the A and B versions of the S version. Compared with SB, SA is relatively small. The width of the same size SA is relatively narrower than that of SB, but the length of clothes and sleeves is the same, but the bust is different, and YA, Yb, Yb are similar. I hope my answer can help you, hehe.