Sturdy polyester webbing with a durable quick-release plastic buckle and a heavy-duty zinc alloy D-ring along with a reflective logo This USA flag dog collar comes in 5 different sizes and will fit a teacup dog all the way to a 140 lbs dog. For measurements and sizing, please refer to the 4th and the 5th picture in the gallery and compare them with your dog's measurement (neck and weight). It's like the fourth of July every day. Happy birthday, America! We're a family-owned, American company, inspired by our rescued dog. You're a patriot and so is your best friend!