I 100% recommend these bathrobes. Revy (3 years old - size L) and Macky (7 months old - size M) are Duck Tolling Retrievers - their coats hold a lot of water when they’re wet. These bathrobes are not only heavy duty and soak up all the water, but stay on so well. The belly straps hit just right to where they can still go to the bathroom without getting them dirty and the leg straps are stretchy and adjustable. I would say the sizes are true to what they’re supposed to be. We use these towels all the time.