Want super-light gear that's still burly as heck? Say 'hey' to our Ultralight Collection! Constructed with strong, ultralight nylon webbing for a featherweight feel and big rope strength. DESIGN & DETAILS: All sizes: 1" wide Made from tightly woven, light-weight nylon webbing Heavy-duty plastic clip with steel D-Ring Backed by our lifetime warranty Wash by hand in your bathtub or bucket Use warm water and mild soap (not detergent) Thoroughly swish the collar around, then drain the dirty water Hang to dry, uncoiled, away from direct sunlight SIZING: Small = 11" - 15" around, 1" wide Medium = 13" - 18" around, 1" wide Large = 17" - 24" around, 1" wide To find the most accurate size, measure around your dog's neck where the collar would sit. Make sure to leave room to slide at least two fingers comfortably under the collar