CrocsUnisex-Adult Baya Clogs

Hello I'm a size 8 so what size should I get?

Trying to order size 10 mens but keeps coming up size 12 in cart. What gives?

Is this a men’s size 13?

Is.10 d (m) mens us size?? and if he is a 9.5 would a 10 fit..i would rather a bit bigger than smaller.. thanks you