This handmade dog collar with Optional bow tie is made out of a Royal polka dot 100% cotton fabric. All dog collars are sewn on black polypropylene webbing for added strength and durability. I use a nickel plated d-ring, plastic triglide slide and a quality contoured side release buckle that is designed to hug your dogs neck. The matching bow tie is handmade and removable. The bow tie is attached with a double sided Velcro that wraps around the dog collar for easy on and off. Dog Collar Sizes size XS - neck 7"-11" - 1/2" and 5/8" width size S - neck 10"-15" - 5/8" and 3/4" width size M - neck 12"-19" - 3/4" width size M -neck 12"-19" width 1" size L - neck 15"-24" width 1" size XL - neck 17"-29" width 1" Bow tie sizes XS - 3" S - 3.5" M - 4" L - 5" XL - 5.5" Most of my fabrics are 100% cotton I recommend hand washing in cold water and lay flat to dry.