The Pet Life Reflecta-Sport Windbreaker Dog Raincoat Jacket is Adjustable in 3 areas by the sleeves, hood and Tail-Area. This Dog Coat Features an Adjustable and Removable Hood. This Dog Jacket additionally Features a Reflective strip along the Backside for added safety while dog walking at night. Contains a Lightweight Fleece inner lining. Great for Year-Round. Features a Leash-Slit Holder Along the Backside and Belly Velcro for Easy On and Off access. Sizing Guide: Measure From Back of Neck to Tail area (""In"" Inches) 8"" : EXTRA SMALL 10-12"": SMALL 14-16"": MEDIUM 18-20"": LARGE 22-24"": EXTRA LARGE