E-Collar King Size - Ideal for injuries, rashes and post-surgery recovery. - Sizing: 8.0" X .25" X 15.0" (Small)-------------Dogs Neck Sizes: 8"-9" 9.5" X .25" X 18.0" (Medium)------------Dogs Neck Sizes: 9"-12" 12.5" X .25" X 23.8" (Large)------------Dogs Neck Sizes: 12"-14" 16.63" X .25" X 30.13" (X-Large)--------Dogs Neck Sizes: 14"-21" 20.75" X .25" X 38.38" (King)-----------Dogs Neck Sizes: 21"-25" Made in USA