Small Pet Helmet with Ear Hole, Motorcycle Dog Helmet, Multi-Sport Dog Hard Hat, Outdoor Bike Doggy Cap for Dog and Cat

Size S head to chin size ajustable 16.5"-18.5", fit dogs about 17lb-27lb, the fit would depend on how big and head circumference your dog is, not the breed.

Size M head to chin size ajustable 18.5"-22.4", fit dogs about 27lb-44lb, the fit would depend on how big and head circumference your dog is, not the breed.

Size L head to chin size ajustable 22.4"-25.1", fit dogs about 44lb-88lb, the fit would depend on how big and head circumference your dog is, not the breed.