Please use our size charts as a general guide to help you select your size for our swimwear and activewear. If you have a specific sizing question or would like more information, please e-mail to theMF • SEA girls. We are always happy to advise!

Our suits run pretty true to size as per our size charts.  Our suits are designed for comfort and being active, both in and out of the water. They are made with 100% recycled materials and double-lined for durability, so our fabric won’t stretch out as much as other swimwear you might be used to. This means that if you are on the cusp between two sizes, we would recommend sizing up, as our fit may feel more snug. 
We recommend measuring yourself following the guidelines provided on our size chart page.  Please note, some of our styles do differ and have a unique fit. So in addition to using our size charts, we recommend also referring to any specific recommendations provided on each product page. 

We would typically recommend going with the larger of the two sizes to ensure a comfortable fit all around.

We recommend going with a larger size to accommodate for height, typically the smaller size will be too short. Some of our suits have a more slim, high-waist than others, so these should still fit well around the waist.

All MF • SEA swimwear pieces are made with ECONYL® regenerated nylon, in Portugal, given new life through repurposing ghost-fishing nets that pollute and kill their oceanic environment and other nylon waste.