Skechers Women's Be-Light-Well-to-Do Sneaker

I want these in size 8/black.
But on each webpage I can only select EITHER a color OR a Size.
I’m new here and not sure what’s going on?

ETA: SPOKE W CS.
Even though full Menu of sizes displays, it’s possible there’s
only ONE size left.

Size 8 is sold out. Sold out items usually show as grayed out but that could be different on some devices.