Sizing is very important to our furry friends. It can't be too big or too small. It has to be juuuuuuust right. As all products are sized a bit differently, this very important information can be found on the product detail page for that item. Look for the 'Sizing' tab beneath the product imagery and pricing information (it will be to the right of the 'Description' tab). We do recommend that if your pup is at the very upper-end of any size to purchase the next size up.
If at anytime you have a questions please feel free to contact us. We would love to help!