It's very important to measure the paw then check our sizes. For the length measure underneath from the toe pad to the last pad. For the width measure flat across the top of the paw at the widest part not including the sides. Alternatively, you can have your dog standing on a piece of paper and then mark both sides of the paw and measure the distance between these marks. If your dog is 60 lbs + we recommend going up one size from where the width matches on our sizing. If you need assistance, please feel free to contact us and we'd be happy to recommend the best size.