The Comfy Cone lets your pet heal in comfort. Made of water resistant nylon foam that is soft sturdy and protective. Fully adjustable Velcro fasteners and elastic loops thread through your pet’s collar so cone stays secure. Lightweight, flexible, folds back for eating and drinking. More comfort and less stress than traditional e-collars. Reflective binding on edges for night time walks. Depth measurements equal neck to snout. Small is for dogs with a neck measurement of approximately 8″ – 10.5″ depth measures 5.5″.