The size chart can be seen in the photos. Matching leashes are 52" long by 1". 

We strive for perfection in the production of our collars, please know they are handmade with love in our small shop. All pieces of fabric are cut, ironed, and sewn to be the right fit for your dog. Exact pattern placement will vary from collar to collar, though we aim to make sure the best pieces are visible. Different widths will show more or less of the pattern, the collar photographed in the listing is 1" wide.