Wetsuit sizing does not follow the rules of everyday clothing. A wetsuit that fits correctly will feel tight on dry land and more natural once you hit the water. The goal is a second-skin seal that lets a thin layer of water in, warms it, and holds your body position high without chafing, shoulder restriction, or water flushing through the neck.
A well-chosen blueseventy suit lets you breathe deeply, lift your arms overhead, and roll into the catch without fighting the neoprene. Get the size wrong and you give up speed and comfort. Here is how to get it right.
Use the size chart first
blueseventy’s size charts are built from height and weight ranges specific to each suit model. The Sprint, Fusion, Reaction, and Helix each have slightly different panel cuts and neoprene thickness, so the chart matters. Find your model’s page on the site, open the size chart, and locate your height and weight. That intersection gives your recommended starting size.
Do not treat the size chart as a hard boundary. Body shape affects where a suit pulls tight or bags. A swimmer with broader shoulders or thicker thighs may move up from the chart’s recommendation. A lean triathlete who races frequently may choose a size down for a compression-like fit. But start with the chart. It gets you in the ballpark.
What Women’s Femme Fit changes
Every women’s blueseventy wetsuit uses Femme Fit sizing. The pattern is refined in the bust, torso, wrists, and ankles for a shape that matches the female body rather than a scaled-down men’s block. The neckline sits lower to reduce chafing, and the zipper is extended to clear wider hips and speed up transitions.
If you have endured unisex cut suits that gapped at the lower back or restricted chest movement, Femme Fit is built to solve that. Use the women’s-specific size chart, which accounts for hip and bust measurements, to narrow your selection.
Donning a wetsuit correctly changes the fit assessment
Most swimmers who think a suit is too small simply have not pulled it up far enough. Start with dry, bare hands. Use your fingertips, not your nails. Grip the inside of the suit’s legs-never the exterior-and shimmy the material upward a few inches at a time. Walk the suit up your legs until the crotch sits flush against your body with no gap. Only then pull the shoulders up and slip your arms in. Work the zipper cord slowly.
Once the suit is on, reach both arms overhead. You should have full range of motion. The chest will feel compressed; that is normal. In the water, a few seconds of swimming will settle everything into place. The neck seal must sit flat and closed without gaps, but you should be able to swallow and turn your head without rubbing.
Between sizes: what to do
If your height falls in one size bracket and your weight in another, let weight dominate. Buoyancy and seal depend on the neoprene stretching correctly around your mass; a suit that is too loose lets water circulate and loses the body position benefit.
Still unsure? Consider your training pattern. Frequent swimmers who log multiple sessions per week in a suit often prefer the slightly more durable fit of a Fusion or Reaction in a true-to-chart size. Racers chasing every second may tolerate a tighter Helix fit, but be aware that overly thin neoprene can tear more easily if it is forced to stretch beyond its designed range.
The test swim removes the guesswork
blueseventy lets you swim in your wetsuit and still exchange it. That policy means you do not have to decide based only on how the suit feels in your living room. Put it on properly, swim for 10-15 minutes, and ask yourself three questions:
- Does water stay out at the neck and cuffs?
- Do my shoulders feel free after 200 meters?
- Does the suit ride up or shift?
If the answer to any of those is yes, try a different size.
Returns are accepted within 30 days of the ship date, as long as the suit is clean, dry, and undamaged. The test swim does not affect your refund eligibility. That safety net means you can try the size the chart suggests, get in the water, and swap if needed.
One last fit check
Zip up, wade in, and swim. A well-sized blueseventy suit will disappear into your stroke. If it fights you during the catch or recovery, it is not a bad suit-it is the wrong size. Start with the chart, don carefully, test in the water, and exchange if the fit is off.
Find your size chart at blueseventy.com or visit our fitting guide for a video walkthrough. Take it for a test swim. You will know in the first few hundred meters.
Happy Swimming.
