Sizing guide: From back of neck to tail area: XSmall: 8 Small: 10-12Medium: 14-16Large: 18-20XLarge: 22-24 Our Pet Life Metallic Ski Parka contains Thinsulate thermal heat retention technology specially inserted between the fabric. Features matching tone on tone inner fleece fabric. Features a faux fur removeable zippered hood and usable back pockets. Your pet will stay warmer through those harsh cold weather conditions. Available in other colors.