Sizes to fit beds as follows (measurements refer to the actual bed):
XSmall:
Frame Dimensions cm - W36 x L64 x H11
Suitable for: Chihuahua, Yorkshire Terrier, Papillon, Miniature Dachshund
Small:
Frame Dimensions cm - W49 x L73 x H15
Suitable for: Shih Tzu, Border Terrier, Pug, Westie
Medium:
Frame Dimensions cm - W59 x L92 x H18
Suitable for: Whippet, Border Collie, Springer Spaniel, Staffordshire Bull Terrier
Large:
Frame Dimensions cm - W69 x L111 x H21
Suitable for: Weimaraner, Hungarian Vizsla, Husky, Boxer, Labradoodle
XLarge:
Frame Dimensions cm - W80 x L126 x H23
Suitable for: Newfoundland, Great Dane, Japanese Akita, St Bernard, Irish Wolfhound
XXLarge:
Frame Dimensions cm - W89 x L145 x H28
Suitable for: Very large for their breed dogs & dogs that like to share