This is a great bed--much larger than you'd expect, as echoed by similar comments. I have a 50 lb. border collie and the medium is a great fit that lets her either curl up in the middle, or fully stretch out across the length of it.  It doesn't seem to have quite enough padding on the inside, so after a week of use it is already starting to get flat in the middle where she sleeps. Washable and dirt repellent--it looks great in my living room!