Soft, stretchy, and resilient. This cushioned, lightweight harness has three attachment points to suit different walk styles. Plus, adjustable straps at the neck, chest, and back accommodate different sizes, and make it a breeze for pet parents to slip it on and off. MaterialsSoft stretch poly base, woven nylon straps, and coated carbon steel D-rings Product Dimensions & Specs: Harness Without Neck Buckle:XS: Neck = 8"-11", Chest = 12"-15"S: Neck = 10"-14", Chest = 14"-22"M: Neck = 12"-18", Chest = 18"-28"L: Neck = 16"-21", Chest = 24"-38" Orchid Harnesses with NEW Neck Buckle Only:Additional neck buckle for maximum adjustability, easier on and off, and a better fit for most breeds. Sizing has changed slightly with this new design, so please refer to the measurements below for the best fit: XS: Neck = 10"-11", Chest = 13"-16"S: Neck = 12"-14", Chest = 16"-22"M: Neck = 15"-18", Chest = 20"-28"L: Neck = 17"-22", Chest = 26"-38"