The Exclusivo Mezcla orthopedic dog bed is specially designed with 3.5 inches high-density egg crate foam to provide your furry friend a restful sleep and pressure relief to reduce joint pain and arthritis discomfort. There are 6 colors available and for each color there are 4 standard sizes in the range of 30x20 36x24 42x28 48x30 IN to choose from. M:30 x20 fits up to 35 lbs L: 36?x24? fits up to 65 lbs XL: 42?x28?fits up to 90 lbs XXL: 48?x30? fits up to 110 lbs.