Nike Air Presto sizing?

[sly logic]

I have a slightly wide foot and I would like to know if I should size up when buying prestos.

 

[fresh out dabox]

half a size up

 

[soleaddict33]

Prestos are sized like clothing. XS=7.5-8.5, S=9-10, M=10.5-11, L=11.5-12, XL=12.5-13