XS SM MD LG XL
Bill Width 4.5" 5.25" 5.9" 6.4" 7"
Head Width 3.5" to 4.25" 4" to 5" 4.5" to 5.75" 5.5" to 6.25" 6" to 6.75"
Neck Size 12" to 15" 14" to 16" 15" to 18" 17" to 21" 20" to 25"
Approx. Weight 13 to 25 lbs. 22 to 45 lbs. 40 to 65 lbs. 60 to 100 lbs. 100 to 150 lbs.