REEFCushion Breeze Women's Flip Flop, Ultra Soft Cushion Footbed, Arch Support

Do these flip flops squeak when wet?

If I wear an 8 1/2 what size should I buy?

Is the arch support on these the same, more, or less than the "Reef Cushion Stargazer"?

Can a guy wear these? I have small feet.