Q: How can I measure my pet? A: The length of your pets back is measured along the top of the spine from the withers - the high part of the back between the shoulders, where the neck joins the body, to the base of the tail where the tail joins the body. The Girth (or Chest) measurement is taken all the way around the biggest part of your pets ribcage, generally just behind the withers down and around just behind the front legs and back up the other side to the withers. The Neck is measured at the place where your pets collar would naturally rest - from about the top of the chest to just above the withers - this measurement is also taken all the way around. Q: Ive measured my pet. Which size should I choose? A: Please check the size chart in the photo gallery above. e.g.1, the back length of your dog is about 37cm, chest girth is 42cm, neck is 28cm. Size XL is the best for your dog. e.g.2, the back length of your dog is about 25cm, chest girth is 44cm, neck is 24cm. Size L is the best for your dog. e.g.3, the back length of your dog is about 22cm, chest girth is 32cm, neck is 23cm. Size M is the best for your dog. Please measure carefully before buying and sending emails to us if you have any questions about this product. Thanks for your understanding! Q: Is it elasticated? A: Yes, it is. Q: Do the sequins on the shirt make my dog uncomfortable? A: Definitely not. The sequins are sewed outside. Your dog wont feel them.