The Tuffy Collar is an easy clip on, clip off design, with double D Rings for your lead - all pressure from the lead bypasses the buckle, ensuring security and longevity of the buckle on very strong, or straining dogs. The collar strap is fitted with a 50mm wide, tapered, double thickness Neck Pad to spread any pressure broadly over your dog's neck. It is comfortable and incredibly strong. Designed with a Black Neck Pad, you have the choice of a contrasting collar strap, or just straight Black on Black. This is a superbly crafted collar which will give your dog great presence, great neck support and last a lifetime of tough wear, not to mention the fact that all Black Dog gear is fully washable so it will look great throughout its long life. TUFFY Collar - Medium - designed for Staffys, Ridgebacks, Dobermanns and other breeds which would benefit from a wide neck pad and a very substantial and secure collar. Designed for dogs which would benefit from a wide neck pad and a very substantial and secure collar. SIZES: Medium: Adjustable 39-56cm neck, 50mm wide Neck Pad - 25mm wide collar strap, extra heavy duty D rings. Large: Adjustable 47-70cm neck, 50mm wide Neck Pad - 25mm wide collar strap, extra heavy duty D rings.