Small Medium Large Head width (measured between ears), in 4.00 - 5.00 4.50 - 5.75 5.50 - 6.25 Neck size (measured around neck below ears), in 14.00 - 16.00 15.00 - 18.00 17.00 - 21.00 PupLid dog trucker hats offer stylish, veterinarian-approved sun protection, featuring a patented "Furfect Fit" system with adjustable chin straps and ear holes for a secure, comfortable fit during hiking or walking. Made from premium, durable materials, these lightweight, breathable hats protect dogs from UV-induced eye conditions, sunburn, and iris atrophy. .: Material: 100% Polyester (foam front and mesh back).: Available in 3 sizes: small, medium, large.: Small: fits dogs 22 - 45 lbs (10 - 20.4 kg); features a 5.3" (13.5 cm) wide bill.: Medium: fits dogs 40 - 65 lbs (18.1 - 29.5 kg); features a 5.9" (15 cm) wide bill.: Large: fits dogs 60 - 100 lbs (27.2 - 45.4 kg); features a 6.4" (16.3 cm) wide bill
