OutTop Girl Dog Dress, Lace Princess Tutu Shirt Clothes for Small Puppy XS: Back Length: 21CM/8.27" Chest: 30CM/11.81" Neck: 22CM/8.66", S: Back Length: 23CM/9.06" Chest: 32CM/12.60" Neck: 23CM/9.06" M: Back Length: 28CM/11.02" Chest: 39CM/15.35" Neck: 26CM/10.24" L: Back Length: 31CM/12.20" Chest: 44CM/17.32" Neck: 30CM/11.81" XL: Back Length: 35CM/13.78" Chest: 50CM/19.69" Neck: 32CM/12.60" XXL: Back Length: 37CM/14.57" Chest: 54CM/21.26" Neck: 33CM/12.99" For transportation needs, the dress that you've received will have a fold phenomenon. Please don't worry, this fold situation will disappear after the first time you clear or ironing. Please measure your pet size and compare with the size chart in the "Product description". Suitable size will make your pets comfortable and happy.Use similar clothing to compare with the size.