SPLASH ABOUT HAPPY NAPPY **Safety - Comfort - Security** Stylish Swim Wear for Infants and Toddlers Clean, Warm and Happy in the Pool Allows longer to be spent in the pool than traditional swimwear. The most essential item in your infant's swim kit. Peace of mind in the Pool - ensures little accidents are contained within the nappy. SPF 50 - Sun Protection, Maximum UV Protection Reusable and Easy to Clean. To reuse your Happy Nappy immediately after cleaning, roll the nappy in a towel and squeeze. It is now ready to use without discomfort. You may also use it with a liner or simple swim nappy for ease of cleaning but it will also be fine on it's own. Most pools make a swim nappy like this mandatory due to very strict hygiene rules. Recommended by leading swim schools. Splash About are the children's swim wear specialists and you can be assured of the highest quality product which can be used again and again. Sizing Guidelines: M - around 3 - 6 monthsL - around 6 - 12 monthsXL - around 12 - 24 monthsXXL - Toddler The sizing guide works for most babies but like us they come in all shapes and sizes If you're not sure between two sizes,we would advise to size up as these have been small fitting. You can see full size guide linked here for guidance.https://www.splashabout.com/size-guide/PLEASE NOTE if you have orderedpreviously? The new designs available have been found to be smaller fitting, if in doubt we would recommend a larger size is ordered.