Pet Life ® 'Advent' Outdoor Series 3M Reflective 2-in-1 Martingale Dog Leash and Collar is composed of Heavy-Duty Nylon with Reinforced Stitching for added durability and toughness. The Collar features High-Grade Alloy engraved Quick-click buckles and the leash features a uniquely designed safety lock leash attachment that swivels for Multi-Directional Tugging or Pulling. The Martingale Dog Leash features an up close and personal secondary adjustable training loop designed for behavioral correction and control. Available in Multiple Sizes and Colors. Sizing Guide (INCHES)COLLAR AND LEASH DIMENSIONS:SMALL: LEASH LENGTH: 48" WIDTH: 0.59" NECK GIRTH: 13.38" - 15.74" MEDIUM: LEASH LENGTH: 48" WIDTH: 0.78" NECK GIRTH: 13.56" - 17.71" LARGE: LEASH LENGTH: 48" WIDTH: 0.98" NECK GIRTH: 15.74" - 20.47" Pet Life Reflective Orange Collar with Leash, Large Stainless Steel | CLSH15ORLG