Size 36O Swimwear
Also labeled UK 36K and EU 80O
Holding an O cup on a mid-to-larger band takes swimwear sized by band and cup, which is what 36O gives you. Check the fit dry and again after a swim. Compare brands and labels in our Swimwear Size Chart.
Checking the Band on a 36O Swimsuit
On a 36 band, the band carries a large share of the support, so it should feel firm without rolling or digging. Sit down in the suit, since a band that feels fine standing can ride up or fold when you bend at the waist. Slide two fingers under the band at the back; it should feel snug, not tight.
With an O cup, check the straps last. If they leave a mark after a few minutes of standing, ease them off and look at the band again.
Cup Coverage for a 36O Bust
Do not judge an O cup by the front view alone; turn sideways and check the cup reaches all the way back. Settle each side into the cup, then raise your arms and check that nothing slips out at the side or bottom. The cup edge should lie flat at the top and sides, with no ridge and no gap.
In UK sizing, look for 36K. A UK K is a US O, which is four cups larger than a US K.
When a 36O One-Piece Pulls at the Shoulders
When a one-piece pulls down on your shoulders, the torso is often too short for you rather than the straps set wrong. 36O needs fabric over the bust as well as down the body, so check the length while sitting, not only standing. If fabric bunches at your waist instead, the torso may be a little long.
Looking for everyday support as well? Try our 36O bras.
Frequently Asked Questions About Size 36O Swimwear
How does 36O swimwear convert to UK and EU sizes?
Look for UK 36K or EU 80O, and do not confuse that UK K with a much smaller US K. Follow the system printed on each label.
Why do 36O one-piece straps dig into my shoulders?
Usually the torso is a little short or the band is not carrying enough of the weight. With an O cup, check both before tightening or loosening the straps.
Is it normal for 36O swimwear to fit differently between brands?
Yes. Brands cut cups and bands differently, so 36O can feel firmer in one suit and roomier in another. Use the size chart for each brand and judge the band and cups on you.
How can I check 36O swimwear fit at home?
Put the suit on, lean forward to settle into the cups, then stand and check the band in a mirror from the side. Raise your arms, sit and twist, then look for movement at the band or spilling at the cup edges.
Does a higher neckline give more support in 36O swimwear?
No, not on its own. A higher neckline adds coverage, but support for an O cup comes from the band and the depth of the cups. Choose the neckline you like once those two fit.
How do I help 36O swimwear keep its fit?
Rinse the suit in cool fresh water after each swim and dry it flat in the shade. Fabric that keeps its shape keeps the band on a mid-to-larger band firm for longer.