XS Bust 25cm back length 15cm (for 1-2 pounds of small dogs)

S: Bust 30cm back length 18cm (for 2-3 pounds of dogs)

M: Bust 35cm back length 23cm (for about 4 pounds of dog)

L: Bust 42cm back length 28cm (for about 6 pounds of dog)

XL: Bust 47cm back length 33cm (for about 9 pounds of dog)

XXL: Bust 52cm back length 38cm (for 12 pounds of dogs around)