Brand new to My Favorite Groomer LLC.  One size fits all.  Best way to keep them in good shape is to not walk around in them.  Use them at the grooming table and when not grooming take off.  When you walk all over in them, on the street and pavement and all over the salon, you will walk through the bottom of them.  So, use them when you need them most; when you are grooming and hair is flying down toward the floor.  Take off, sweep off the hair on the bottom, then put aside until next groom day. 
 
Mens shoe sizes may not fit after size 8 for men.  Dede wears a size 7.5 women's shoe, and they can be used for 2+ or minus that size in her opinion just fine. Silk Shoe covers to protect your shoes while you groom dogs!  Yup, those particles of hair get into your shoes and clothes and force you to be pricked regularly or change shoes and clothes super often.  Not any more.  This will help curb that problem.  Extending the life of your sock and your shoes.  Handmade by Betty D for the My Favorite Groomer LLC Collection!  I hope you love them, Dede.   All Sales Final. Use as often as you need, shake or use tape to get bulk hair off, wash as usual (or like Dede does, with groomer clothes only), then hang dry.