Coastal Pet Circle T Layered Fashion Leather Dog Collar Pet Head WEIGHT (LBS) 2 3 MONTHS 4 6 Size:35 lb WEIGHT (LBS) 2 3 MONTHS 4 6 MONTHS 7 12 MONTHS 13 18 MONTHS 3 – 12 lb: 1 – 2½ cups ¾ – 1¾ cups ½ – 1¼ cups ½ – 1 cups 13 – 20 lb: 2¾ – 3½ cups 1¾ – 2¼ cups 1¼ – 1¾ cups 1 – 1½ cups 21 – 40 lb: 3¾ – 5¾ cups 2½ – 3¾ cups 1¾ – 2½ cups 1½ – 2¼ cups 41 – 60 lb: 5¾ – 7½ cups 3¾ – 4¾ cups 2¾ – 3½ cups 2¼ – 2¾ cups 61 – 80 lb: – 5 – 5¾ cups 3½ – 4 cups 3 – 3½ cups 81 – 100 lb: – 6 – 6¾ cups 4¼ – 4¾ cups 3½ – 4 cups 101 – 120 lb: – – 4¾ – 5½ cups 4 – 4½ cups Add ½ cup for each additional 20 lbs • Keeps Pets Cool in the Summer With the Circle T® Layered Fashion Leather Collar top quality leather