Keeping your dog comfortable and safe is easy with the Ezy-Dog Double Up Collar. It's made from long-lasting materials and contains two D rings to remove pressure from the buckle and ensure a secure fitting to the lead. Comfy soft-touch webbingThe two stainless steel D Rings remove pressure from the easy access buckleComfortable and easy to cleanReflective webbing for nighttime safetyAccessory D Ring for attaching ID tags, lights etc.Size: SmallSizeNeck SizeCollar WidthS22 - 29cm (8.5 - 11.5")12mm (.47")M29 - 40cm (11.5 - 16")19mm (.75")L39 - 59cm (15.5 - 23")25mm (.98")XL47 - 71cm (18.5 - 28")38mm (1.5")