What Does One Size Mean and What Size Is It?
"One size" is a single size that fits a range of standard sizes thanks to the stretch of the fabric. At Saltylines, our one-size pieces cover XS to L, XS to XL or S to XL, depending on the style, so what matters is checking each garment's range and comparing it with your measurements.
In short:
- Definition: a size that fits several sizes thanks to a very stretchy fabric, like our seamless knit in 92% nylon and 8% elastane.
- Leggings: the Serra fits XS to L (waist 60 to 85 cm) and the Eira, XS to XL (waist 60 to 92 cm).
- Tops and tank tops: the Sauda, the Alea and the Vera fit XS to L (bust 78 to 100 cm), and the Liora, S to XL (bust 83 to 107 cm).
- Shorts: the Aura fits XS to L (hips 84 to 105 cm) and the Nara, XS to XL (hips 84 to 112 cm).
- Key tip: in one size, the lower end of the range feels gentler and the upper end more compressive. For individual sizes, if you're between two, choose the smaller one for more compression and the larger one for a relaxed fit.
What does "one size" mean in activewear?
"One size" means the same garment works for several sizes because the fabric stretches and adapts to your body. It works especially well for seamless pieces, knitted in a single piece with no side seams, and for socks. The key is that one size doesn't mean "fits everyone": each garment has its own range.
One-size equivalents by garment
These equivalents are based on the measurement chart in our size guide, in centimeters:
| Garment | One size | Bust (cm) | Waist (cm) | Hips (cm) |
|---|---|---|---|---|
| Serra Leggings, Aura Shorts, Sauda Top, Alea Tank Top and Vera Tank Top | XS to L | 78–100 | 60–85 | 84–105 |
| Eira Leggings and Nara Shorts | XS to XL | 78–107 | 60–92 | 84–112 |
| Liora Top | S to XL | 83–107 | 67–92 | 90–112 |
One size in leggings
The Serra Seamless Leggings are one size, XS to L, and the Eira Seamless Leggings, XS to XL. For leggings, the measurements that matter most are your waist and hips. The Hydra and Omega Leggings, on the other hand, come in individual sizes.
One size in tops and tank tops
The Sauda Top, the Alea Tank Top and the Vera Tank Top are one size, XS to L, and the Liora Top, S to XL. Here, the key measurement is your bust. The Aurora and Hydra tops come in individual sizes, and the Omega Oversized Tee isn't one size: it comes in double ranges, XS/S, M/L and XL/XXL.
One size in shorts and bikers
The Aura Seamless Shorts are one size, XS to L, and the Nara Seamless Shorts, XS to XL. Focus mainly on your waist and hips. The Aurora Biker Shorts come in individual sizes, XS to L. And our cotton sports socks are one size, 9 to 11.
How do I know if "one size" will fit me?
- Measure yourself: your bust at its fullest point, your waist at the narrowest part of your torso and your hips at their widest point.
- Compare: check your measurements against the equivalents chart above or our size guide.
- Check where you fall in the range: at the lower end, the fit will feel gentler; at the upper end, more compressive.
- If you fall outside the range: choose a style with individual sizes, or write to us with your measurements and we'll recommend a size.
One-size FAQ
What does one size mean?
It means a single size that fits several standard sizes thanks to the stretch of the fabric. At Saltylines, one-size pieces cover XS to L, XS to XL or S to XL, depending on the style.
What size is one size?
It depends on the garment. The Serra Leggings, the Aura Shorts, the Sauda Top and the Alea and Vera tank tops fit XS to L; the Eira Leggings and the Nara Shorts, XS to XL; and the Liora Top, S to XL. Always check each product's range.
How do I know if a one-size piece will fit me?
Measure your bust, waist and hips and compare them with the size guide. If your measurements fall within the garment's range, it will fit you. At the lower end of the range, the fit feels gentler; at the upper end, more compressive.
What if I'm between two sizes?
For garments with individual sizes, choose the smaller one for more compression and the larger one for a more relaxed fit. For one-size garments, all that matters is that your measurements fall within the range.
Does one size work if I'm an XS or an XL?
It depends on the style. If you're an XS, choose pieces whose range starts at XS, like the Serra or the Sauda Top. If you're an XL, look for those that go up to XL, like the Eira, the Nara or the Liora Top.
Explore our workout bottoms and sports tops and tees to find your size.