Company Of Animals Soft-E Fabric Elizabethan Collar - Size 2 Size 0: 5.91-8.27 Inchl Size 1: 6.3-9.84 Inchl Size 2: 9.84-12.2 Inchl Size 3: 12.2-15.75 Inchl Size 4: 15.75-22.05 Inchl