Also available for the whole family! our classic solar onesie made for the most important member of the family. Put this on your furry friend and make cuddle time much, much cozier. our dog onesie was designed for small and medium breeds in mind. If your pup is fluffy or maybe perhaps on the chunkier side, we recommend sizing up! please refer to the onesie measurements below: s (under 10lbs): onesie length: 10.25" m (10-18lbs): onesie length: 11.75" l (18-25lbs): onesie length: 13.87" xl (25-30lbs): onesie length: 16" xxl (30-35+lbs): onesie length: 18.12" onesie measurements: s (10-20lbs): onesie length: 10.25" m (20-30lbs): onesie length: 11.75" l (30-40lbs): onesie length: 13.87" xl (40-50lbs): onesie length: 16" xxl (50+lbs): onesie length: 18.12" 55% cotton. 42% polyester. 3% spandex.