StarMark Add-A-Link Large collar add-on provides gentle, effective control in a patented humane design. High strength link design fits together in a watchband pattern. Links can be removed or added with Add-A-Link sets to create the perfect fit for any size dog. Available in blue in sizes:
Large 21" circumference
Small 15" circumference
Add-A-Links are sold in packs of three links in large and small sizes.