Product DescriptionSmall dogs or cats: X-Small: Chest circumference 11.8 ", back length 7.9 "; Small: Chest circumference 13.8 ", back length 9.8 "; Medium size: Chest circumference 15.7 ", back length 11.8 "; Large size: Chest circumference 17.7 ", back length 13.8 "; x - Large size: Chest circumference 19.7 ", back 15.7 "; xx - Large size: Chest circumference 21.7 ", back length 17.7 ". Please measure your dog's neck, chest circumference and back length before purchasing.Thermal wool lining: The interior of the wool lining provides additional warmth and comfort, making it perfect for cold weather outingsEasy to wear: Stretchable knitted material ensures that both dogs and cats can wear it easily without restricting their movementPerfect dimensions: Detailed measurements ensure the best comfort based on chest circumference and back lengthVersatile seasonal wear: Suitable for vacation occasions and daily winter walks, making your pet comfortable and stylishCheckered and ruffled design: Classic checkered patterns and exquisite ruffled decorations create a fashionable pet clothing look for trendy pets.