DO NOT fit any medium or large dog breeds. Please priority follw the chest size. Size XX-Large, fits 18.2" back, 21.7~23.6" chest. Glows in the Dark: The sweater is printed with unicorn and star patterns with luminous effects, you need to place the dog pajamas in light or sunlight a few minutes in advance for better night light effect. Unique design keeps your pet warm and fashionable during winter. Warm & Soft Material: This dog sweaters for small dogs is made of double-face soft velvet. Make your pet's winter snuggly and thermal. Warm & Soft Material: This dog sweaters for small dogs is made of double-face soft velvet. Make your pet's winter snuggly and thermal. Comfy & Stretchy: Ribbing for a comfortable & snug fit with an easy pull-on design, 4-legs design with elastic under belly for perfect fit. XPUDAC Dog Sweater Glows In The Dark Fleece Dog Pajamas for Small Medium Dogs Girl Boy Winter Dog Clothes for Halloween Cristmas Winter