The Touchdog Tough-Stitched Durable Embroidered Collar and Leash features Dual-reinforced stitching for durability and a designer printed pattern with an accented Buckle and a Stainless Steel leash connector. Sizing Specifications - (In Inches). SM - Neck Circumference - 7.87 - 11.81" Weight - Up to 7.7 Lbs MD - Neck Circumference - 9.84 - 14.57" Weight - Up to 17.68 Lbs LG - Neck Circumference - 13.65 - 19.88" Weight - Up to 32 Lbs