PLEASE CHECK SIZING IMAGE AND VIDEO BEFORE PURCHASING: To help you choose the correct size for your child please check our video and image to ensure the wearer has the most comfortable fit. The chest size is the most important measurement as not all kids of the same age or weight are the same size. If your childàsize is between sizes, then we recommend the bigger size. | Developed for safety, warmth and comfort - At Limmys all our products are designed by parents for parents. We have children ourselves and poor experiences with swimming vests before led us to believe there had to be a better solution. So, we designed our own toddler swim trainer! With the help of our kids we created for you what we believe is the perfect vest! | Unique design - Why settle for anything but the best? Unlike other designs, your Limmys vest has an added strap that secures under the child's crotch meaning that the vest stays in place and adds to the products safety. The Zip is extra strong to ensure that it doesn't break easily with multiple uses. | Not all little swimmers are the same - We know that it is never easy to choose the right size, so our photos have been created to help you make the right decision on which size is right for your little one. This is a buoyancy aid/swim vest. Please note this is not a life vest or life jacket. | Why choose us? Limmys is a UK family owned business supplying quality kids0roducts to the UK and Europe for many years. Our emphasis is on fun while learning, functionality, affordability and of course first and foremost safety. We judge our performance on the happiness of our customers and our priority is to maintain our 100% seller rating score. If you need us for any reason, just drop us a line and we will take care of you.