DLGJPA Men's Lightweight Quick Drying Aqua Water Shoes Athletic Sport Walking Shoes

So i have ms and i need a good fit because my right foot limps when walking. i ware a 8.5 what size should i get?

How are these for swimming?

Do these wonderful looking shoes come in (wide)?, If so; how do i order them?.

Will these shoes float? Like in one fell off doing water sports.