Coastal Pet Products DCP551510 10-Inch Titan X-Fine Chain Dog Training Choke/Collar with 1.5mm Link, Chrome Order 2 inches larger than your dogs neck size This choke chain is sized by total overall length, including the rings. Measures 10-inch overall length and 1.5-mm link diameter. Titan dog training choke/collar is excellent for gentle control This extra fine quality chain is argon welded and chrome plated for maximum strength and durability. It will not tarnish, rust, or break and recommended for professional training Use only when dog is attended on leash and is sized by total length, including the rings