I ordered a few extras and got the wrong size. It would cost me more to ship them back then to just order more. They are great dog boots. Will most likely fit a female GSP or similar sized dog. Most labs have bigger feet then this but check out http://www.gundogsupply.com/lewis-rubber-dog-boots.html
for sizing your dog. I have two full sets myself, one vented and on unvented and love them. Unless you have a two legged dog you will need a few more but the price is right.