MaboveSwim Water Shoes Socks Barefoot Protecting for Sea Beach Swimming Pool Ladies Women Mens

Would these work for a work environment that is slippery?

Do they have an insole ?

Which size chart is correct: the picture one or one beside Select Size dropdown? I have tiny feet - 22cm - and not sure weather 2.5/3 will fit well

Does the sand get into these swimming shoes when playing bech volleyball?