Because you'll want to look your best on the beach or in the swimming pool, Sainsbury's has put together this handy guide.

Read on for approximate swimsuit size conversions, and feel confident in your choice of swimsuit.

Use this size conversion guide to get the best fit for your swimwear:

Use this size guide for watershorts with an elasticated waistband:

Use this guide for Men's fixed waistband watershorts:

Girls' size chart 

Use this conversion chart to get the best fit for girls' swimwear:

Boys' size chart

Use this conversion chart to get the best fit for boys' swimwear:

Here are a few pointers to help you get the most out of your swimwear: