How to treat American Amazon crocs shoe size?

If you say a pair of shoes in size 7, there will be two sizes: 7 D(M) US 7 2E US. Usually you buy shoes on American websites. Under the same shoe size, there are five kinds of women's shoes and four kinds of men's shoes with different widths:

1, X narrow: women's shoes size S or AA.

2. Narrowness: N or A size for women's shoes and N or C size for men's shoes.

3. Normal width: M or B for women's shoes and M or D for men's shoes.

4. Width: W or D for women's shoes and W or EE for men's shoes (2E).

5.X-Wide: XW or EE(2E) for women's shoes and XW or EEEE(4E) for men's shoes.