S: diameter 12cm M: diameter 14cm L: diameter 17cm XL: Diameter 20cm Quality & Safety: the dog bowls are made of high-quality stainless steel with a high-end polished finish that makes them sturdier, more durable, and have better stain- and rust-resistant performance. Compared with plastic or ceramic dog bowls, this one is absolutely a better alternative Wont Spill, or Slip: Silicone on the dog bowl bottom, which makes it grips the floor, so it keeps your bowl in place and protects your floors. Get these for dogs that like to push his bowl around. Besides, the bowl is deep enough to keep food and water in the bowl Good Design: Wider rim makes it easy-handing by humans, better fit on the dog food stand. Besides, the flat rim design is also friendly to your dogs tongue Easy Maintenance: With premium stainless steel, and a high-quality polished finish, the bowl is really easy to clean. You can clean it by hand, and its dishwasher safe, so just put it in the dishwasher Size Guide: These bowls are available in 4 sizes: S, M, L, XL. S is made for small-sized dogs, M is designed for medium-sized dogs, L is for large breeds, and XL is ideal for X-Large dogs. Please note: capacity is calculated by total volume. When using container, choose a capacity greater than what you need to prevent overfilling and spills