The oval outer ring creates the feeling of security pets love, while the removable tufted cushion can be used as a crate or travel mat. Circular tufting creates an elegant upholstered look and ensures fiber does not clump or shift when washing. Dimension Base (Bed): XS: 22"x16"x6", SML: 27"x22x"7", MED: 35"x27"x8", LRG: 42"x32"x9", XL: 50"x36"x9", XXL: 55"x36"x11" Inner Dimension XS: 15"x11"x3", SML: 19"x11"x5", MED: 26"x17"x6", LRG: 31"x19"x7", XL: 36"x22"x7", XXL: 41"x24"x9"