Lupine products are proudly built in Conway, New Hampshire and Guaranteed (Even if Chewed). They are not chew-proof (no fabric is!) but if they get chewed, LupinePet will replace them. Search on Lupine Guarantee to see how EZ it is!1-inch-wide collars are suitable for medium and larger dogs. There are three adjustable size ranges: 12-20 inches; 16-28 inches; 25-31 inches. To determine collar size, measure snugly around the middle of the dogs neck, then add an extra 5-percent for a comfortable fit. Or, measure the current collar.Lupine Basics are made from woven nylon in 8 solid colors. Made with strong bar-tack stitching and welded steel hardware. To protect fur and skin all exposed ends are turned under and stitched. Matching padded handle leashes, martingale collars, and harnesses are available. Machine or hand-wash, warm water and mild soap (no bleach or bleach alternative). Air dry completely before use.Lupine products are not intended for tie-out.