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SERVICE
SIZE CONSULTATION
The right size is not a coincidence — it is craftsmanship. This is how you find yours.
OUR FIT PHILOSOPHY
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Sirenite cuts are created on real bodies, not on the drawing board. Our fabrics have a high recovery value — they support without constricting and retain their shape even when wet. To achieve this, your swimwear should fit snugly but not pinch anywhere. Two minutes with a measuring tape will save you any uncertainty.
HOW TO MEASURE CORRECTLY
THREE MEASUREMENTS. ONE SIZE.

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HIP CIRCUMFERENCE
Measure at the widest point of the hips and bottom, with feet together. This measurement determines the size of bikini bottoms and is also crucial for swimsuits.
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UNDERBUST CIRCUMFERENCE
Measure directly under the bust, keeping the tape snug but not cutting in. The difference to the bust measurement will determine your cup orientation.
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BUST CIRCUMFERENCE
Measure at the fullest part of the bust, with the measuring tape lying horizontally and loosely. Do not wear a padded or wired bra.
Tip: Measure unclothed or in light underwear, in the morning, and have a second person check the measuring tape — it can easily shift at the back.
OUR FIT PHILOSOPHY
YOUR SIRENITE SIZE
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BIKINI TOPS, SWIMSUITS & CORSETS
| Size | Bust circumference (cm) | Underbust circumference (cm) |
|---|---|---|
| Small | 80–88 | 63–72 |
| Medium | 88–92 | 72–77 |
| Large | 92–97 | 78–82 |
BIKINI PANTS
| Size | Hip circumference (cm) |
|---|---|
| Small | 88–96 |
| Medium | 96–100 |
| Large | 100–104 |
FROM THE STUDIO
THREE FITTING TIPS
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TRY ON AT HOME
Try your order on over your own underwear and keep the hygiene protection in place. This way, exchanges remain hassle-free — and you can find the perfect fit in peace.
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BETWEEN TWO SIZES?
In general, we recommend the smaller size — our fabrics give a little with the first wear. This ensures the optimal and elegant fit.
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THE WET TEST
Good swimwear fits even when wet. Our fabrics lose hardly any tension in water. If a piece fits perfectly when dry, without cutting in, it will remain so when swimming.
THE COLLECTION
SEE WHAT EMERGES
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Everything you have read here can be worn: Discover the current collection — designed in our studio, made in Italy, intended for many summers.