If your pup curls up to sleep a Round Pet Bed will be perfect! (Choose the Rectangular Pet Bed if your dog stretches out to sleep.) ABOUT OUR PET BED COVER: Walks give paws and coats the chance to get dirty, so you want an easily washed cover for their beds. This zip-off bed cover does everything others do — it repels water and oil and wipes clean between washes. It's just much tougher, being heavyweight canvas that stands up to claws. It's finished with matching piping trim and has an easy-sliding, reinforced zipper to conveniently remove the cover. 100% cotton. Machine wash. Use with inserts (sold separately). Imported. Small: 26 diameter Medium 36 diameter Large 44 diameter X Large: 52 diameter ABOUT OUR INSERT: Our new insert is filled with recycled foam in bigger chunks, making it loftier and more cushioning, easier for pets to move around on – and to create the perfect comfy nest. The shell is 100% polypropylene, a fiber so tough that it's often used in outdoor products like rugs. This allows the shell to be much thinner and lighter than the former cotton shell. (Yes, it’s thin enough to be translucent, but that’s the beauty of this fabric: it doesn’t need to be heavy to be dependably tough.) Small: 34 x 4 1/2′′ Medium: 37 x 4 1/2′′ Large: 45 1/2 x 4 1/2′′ Xtra Large: 56′′ x 4 1/2′′ (Medium and Large only available in 48 contiguous states.)