DImension Please measure the longest size of your crate before purchasing. If the longest size of your crate have 24 inch, we will recommend that you purchase the cover for the size S. S: 24.4L ×18W ×19.3H inch for 24 inch crate M: 30.3L x 19.3W x 21.3H inch for 30 inch crate L: 36.6L x 23Wx 24.8H inch for 36 inch crate XL: 42.9L x 28.3Wx 30.3H inch for 42 inch crate XXL: 48.4Lx 30.3Wx 32.3H inch for 48 inch crate