Fits most cats and small and medium dogs.
Please check the breed/weight examples and measuring info here: Size Guide
~4-20 lbs for thin builds
~6-35 lbs for muscular builds
The Pandaloon Bumblebee features a special bee body design so the leg length is not needed:
Size 1/2: Shoulder to shoulder width 4-6 inches. Max girth 21 inches.
Size 3: Shoulder to shoulder width 6-8 inches. Max girth 27 inches.