These work really well with the boots to help get a snug fit. If in between sizes, I'd recommend sizing down so they will be more likely to stay up on your dog's paws. They can be tricky to get on your dog without assistance. I discovered if you fit the sock band over the rim of a small cup, so the sock is inside the cup and held open by the rim of the cup, then you can slide that quickly over your dogs paws. Definitely introduce this process to your dog slowly and with plenty of treats. Now that me and my dog got the routine down , my pup can be in all 4 socks and boots faster then I can lace up my own shoes :)