This handmade martingale dog collar with optional flower is available in a 3/4", 1" and 1.5 inches in width and is made out of a magenta metallic polka dot 100% cotton fabric The slip on collar is sewn on black Polypro Webbing, and finished off with a quality nickel metal d ring and metal adjuster slides. The matching flower is handmade and removable. The flower is attached with a double sided Velcro that wraps around the martingale dog collar for easy on and off. Martingale dog Collar Sizes size S fits neck 12" - 15" width 3/4", 1" or 1.5" size M fits neck 14" - 18" width 3/4”, 1" or 1.5" Size L fits Neck 17" - 24" width 1" or 1.5" Size XL fits Neck 20" - 29" width 1" or 1.5" *Measure the largest part of your dog's head, and the middle of his/her neck. *If your dog's head is larger than its neck, you will need a size that is large enough to slip comfortably over its head. *If your dogs neck is larger than his head, then you need a collar that will fit comfortably around its neck. Your dogs head size will not matter in this case (e.g., Greyhounds, Shelties, etc.) *The collar size you select should adjust large enough to fit over the head, and adjust small enough to fit comfortably around the neck.