Type:Nylon Dog Training Collar/Leash Military Tactical Collar for Medium Large Dogs 7 Colors:Black/Green/Brown/Camouflage/Red/Hot Pink/Blue Material:Nylon with Soft padded Leash size: Stretch state :Total Length : 53″(135cm) Width:1.0″(2.5cm) Natural state : Total length: 39″(100cm) Width: 1.0″ (2.5cm) Size Neck Width M 14-19″(36-48 cm) 1.5″(3.8cm) L 16.5-21″(42-54 cm) 1.5″(3.8cm) XL 19.5-24.5″(50-62cm) 1.5″(3.8cm) Note: Please measure the neck size of your dog before you make an order,thanks . Please allow 0.5-1 inch(1-3cm) error due to manual measurement.