Our goal is to get the best fit possible for your dog, that is why measuring is important. If the socks do not fit please let us know; we will likely ask you to send us a picture with your dog wearing the Grippers to assess fit and ask you to re-measure so we can recommend the best size. We would send out a new pair of Grippers if needed. Once you receive the Grippers and make sure they fit, we would have you donate the pair that didn’t fit to a dog rescue or your vet so another dog could benefit from them. Please keep in mind that the socks do need to fit snug and will stretch.