Buster Rectangle Microfiber REPLACEMENT COVERThe Happy Hounds Buster Dog Bed is a rectangle, pillow style bed featuring durable, double sewn boxed edges finished with a decorative contrast cording. Its reversible design allows for longer use between cleanings, and its heavy duty microfiber fabric is water and stain resistant. This cover can be used on other beds that match the below measurements. Large 48 x 36 x 6 Medium 42 x 30 x 6 Small 36 x 24 x 5 X Small 24 x 18 x 5