Perfect for those 42-inch Costco dog beds. My old dog loves her old bed which was just a $60 bed from Costco. But, the cover was worn through from years of naps. I've tried a couple of replacements including a nice, big, expensive replacement that is the same size, she goes back to the 7-year-old 42-inch Costo circle bed she loves so much. I was marginally worried the new cover would devalue her precious bed but she seems to like it even more with her new MM cover which is great because it's definitely more attractive. Exactly what she and I wanted. Thanks! Quick and easy experience!