XS bust 26CM back length 20CM: suitable for 0.5KG-1KG weight. S bust 31CM back length 24CM: suitable for 1.5KG2KG weight. M bust 36CM back length 28CM: suitable for 2.5KG-3.5KG weight. L bust 41CM back length 32CM: suitable for 3.5KG-4.5KG weight. XL bust 46CM back length 36CM: suitable for 5KG-6.5KG weight. If your cat is small in size, please buy one size smaller. Perfect for summer, this dress is lightweight and comfortable for your pet.Let your furry friend become a princess with our dog dress summer thin cat princess dress rainbow butterfly pettiskirt. The rainbow and butterfly design adds a pop of color to your dog's wardrobe.The chest features a snap button design for easier wearing and removal. Suitable for breeds like Chihuahuas and Pomeranians,It is also suitable for cute cats to wear. this dress is a great addition to any pet owner's collection. Give your pet the treatment with our cute and stylish pet supplies. Product Name: Pet Rainbow Butterfly Tutu Dress Size: XS, S, M, L, XL Applicable Gender: Unisex Applicable Pets: Cats, Dogs. Material: Polyester Category: Pet Clothing If your cat is small in size, please buy one size smaller.