
Size Guide
Here’s a size guide to inform your shopping decision(s)
Mid Waist Bikini
Waist: Measures below the waist, where the top of the bikini sits.
Hips: Measures the widest part of your hips
| SIZE | US | UK | EU | HIPS | HIPS | WAIST | WAIST |
|---|---|---|---|---|---|---|---|
| CM | INCH | CM | INCH | ||||
| 4XS | 000-00 | 0-2 | 28 | 78.5-81 | 31-32 | 58.4 | 23 |
| 3XS | 00-0 | 2-4 | 30 | 83.5-86 | 33-34 | 61 | 24 |
| 2XS | 0-2 | 4-8 | 32 | 88.5-91 | 35-36 | 66 | 26 |
| XS | 2-4 | 6-8 | 34 | 93.5-96 | 36.5-38 | 71 | 28 |
| S | 4-6 | 8-10 | 36 | 98.5-101 | 38.5-39.5 | 75 | 29.5 |
| M | 6-8 | 10-12 | 38 | 103.5-106 | 40.5-41.5 | 80 | 31.5 |
| L | 8-10 | 12-14 | 40 | 108.5-111 | 42.5-43.5 | 84 | 33.1 |
| XL | 10-12 | 14-16 | 42 | 113.5-116 | 44.5-45.5 | 89 | 35 |
| 2XL | 12-14 | 16-18 | 44 | 118-123 | 46.5-48.5 | 93 | 36.6 |
| 3XL | 14-16 | 18-20 | 46 | 125-128 | 49.5-50.5 | 98 | 38.9 |
Note: Please allow for a tolerance of +/- 1 inch
If the bikini is not suitable, please contact us directly. We will aim to get back to you within 24 hours.
High Waist Bikini
Waist: Measures below the waist, where the top of the bikini sits.
Hips: Measures the widest part of your hips
| SIZE | US | UK | EU | HIPS | HIPS | WAIST | WAIST |
|---|---|---|---|---|---|---|---|
| CM | INCH | CM | INCH | ||||
| 3XS | 0 | 4 | 32 | 78.5-81 | 31-32 | 55 | 21.6 |
| 2XS | 2 | 6 | 34 | 83.5-86 | 33-34 | 58.8 | 23 |
| XS | 4 | 8 | 36 | 88.5-91 | 35-36 | 61 | 24 |
| S | 6 | 10 | 38 | 93.5-96 | 36.5-38 | 66 | 26 |
| M | 8 | 12 | 40 | 98.5-101 | 38.5-39.5 | 71 | 28 |
| L | 10 | 14 | 42 | 103.5-106 | 40.5-41.5 | 75 | 29.5 |
| XL | 12 | 16 | 44 | 108.5-111 | 42.5-43.5 | 80 | 31.5 |
| 2XL | 14 | 18 | 46 | 113.5-116 | 44.5-45.5 | 84 | 33.1 |
| 3XL | 16 | 20 | 48 | 118-123 | 46.5-48.5 | 89 | 35 |
Note: Please allow for a tolerance of +/- 1 inch
If the bikini is not suitable, please contact us directly. We will aim to get back to you within 24 hours.
Mid Waist Bikini
Waist: Measures below the waist, where the top of the bikini sits.
Hips: Measures the widest part of your hips
| SIZE | US | UK | EU | HIPS | HIPS | WAIST | WAIST |
|---|---|---|---|---|---|---|---|
| CM | INCH | CM | INCH | ||||
| 4XS | 000-00 | 0-2 | 28 | 78.5-81 | 31-32 | 58.4 | 23 |
| 3XS | 00-0 | 2-4 | 30 | 83.5-86 | 33-34 | 61 | 24 |
| 2XS | 0-2 | 4-8 | 32 | 88.5-91 | 35-36 | 66 | 26 |
| XS | 2-4 | 6-8 | 34 | 93.5-96 | 36.5-38 | 71 | 28 |
| S | 4-6 | 8-10 | 36 | 98.5-101 | 38.5-39.5 | 75 | 29.5 |
| M | 6-8 | 10-12 | 38 | 103.5-106 | 40.5-41.5 | 80 | 31.5 |
| L | 8-10 | 12-14 | 40 | 108.5-111 | 42.5-43.5 | 84 | 33.1 |
| XL | 10-12 | 14-16 | 42 | 113.5-116 | 44.5-45.5 | 89 | 35 |
| 2XL | 12-14 | 16-18 | 44 | 118-123 | 46.5-48.5 | 93 | 36.6 |
| 3XL | 14-16 | 18-20 | 46 | 125-128 | 49.5-50.5 | 98 | 38.9 |
Note: Please allow for a tolerance of +/- 1 inch
If the bikini is not suitable, please contact us directly. We will aim to get back to you within 24 hours.
Mid Waist Bikini
Waist: Measures below the waist, where the top of the bikini sits.
Hips: Measures the widest part of your hips
| SIZE | US | UK | EU | HIPS | HIPS | WAIST | WAIST |
|---|---|---|---|---|---|---|---|
| CM | INCH | CM | INCH | ||||
| 4XS | 000-00 | 0-2 | 28 | 78.5-81 | 31-32 | 58.4 | 23 |
| 3XS | 00-0 | 2-4 | 30 | 83.5-86 | 33-34 | 61 | 24 |
| 2XS | 0-2 | 4-8 | 32 | 88.5-91 | 35-36 | 66 | 26 |
| XS | 2-4 | 6-8 | 34 | 93.5-96 | 36.5-38 | 71 | 28 |
| S | 4-6 | 8-10 | 36 | 98.5-101 | 38.5-39.5 | 75 | 29.5 |
| M | 6-8 | 10-12 | 38 | 103.5-106 | 40.5-41.5 | 80 | 31.5 |
| L | 8-10 | 12-14 | 40 | 108.5-111 | 42.5-43.5 | 84 | 33.1 |
| XL | 10-12 | 14-16 | 42 | 113.5-116 | 44.5-45.5 | 89 | 35 |
| 2XL | 12-14 | 16-18 | 44 | 118-123 | 46.5-48.5 | 93 | 36.6 |
| 3XL | 14-16 | 18-20 | 46 | 125-128 | 49.5-50.5 | 98 | 38.9 |
Note: Please allow for a tolerance of +/- 1 inch
If the bikini is not suitable, please contact us directly. We will aim to get back to you within 24 hours.
- Details
- How it fits / Size guide
- Delivery
- Returns
Invisible under clothes. Powerful under pressure.
Experience the smoothest period protection with our Seamless Period Brief, designed to disappear under clothing while delivering reliable, moderate leakproof support. With bonded edges, buttery-soft fabric, and built-in SavviWear™ gusset technology, this is your go-to for protection you can’t see - but definitely feel.
Why You’ll Love Them
-
No panty lines, no compromises – Laser-cut, bonded seams lay flat for a flawless fit under leggings, dresses, or workwear
-
Leakproof protection that works – Holds up to 20ml (about 4 tampons) for moderate flow, light incontinence, or postpartum support
-
Dry, fresh, and breathable – Bamboo lining wicks moisture and fights odor for all-day confidence
-
Feels like second skin – Soft, stretchy polyamide-blend hugs your curves with a smooth, flexible fit
-
Eco-conscious & reusable – Say goodbye to disposables and hello to sustainable, washable period care
Why SavviWear™ Gusset Technology Stands Out
Unlike other seamless period underwear, Savvi Wear features the SavviWear™ triple-layer gusset - engineered for real-world leaks and real-life movement.
-
Absorbs up to 20ml (4 tampons) with 3-layer leakproof protection
-
Bamboo charcoal lining naturally controls moisture and odor
-
Extended gusset length for better coverage, avoiding front or back leaks
-
Sewn-down gusset construction stays smooth and discreet - no shifting or bulk
-
Designed for discretion and performance - perfect under anything, even tight clothes
SavviWear™ gives you the peace of mind you need, with the invisible support you want.
Materials & Care
Materials
-
Outer: 88% Polyamide, 12% Spandex
-
Gusset Lining: 50% Bamboo Viscose, 50% Polyester
-
Leakproof Layer: Bamboo, Cotton, Polyester + Waterproof TPU
Care
-
Rinse after use, machine wash cold in delicates bag, hang dry. Avoid fabric softeners.
Designed For:
-
Women & teens looking for sleek, seamless protection
-
Moderate flow days, light bladder leaks, or postpartum needs
-
Workwear, activewear, or special occasions
-
Anyone who wants leakproof security with zero visible lines
Available in XS–3XL
Colors: Classic Black & Soft Nude
Invisible, But Unstoppable
From the outside, it’s just your favorite seamless brief. On the inside, it’s packed with power. The Savvi Wear Seamless Period Brief is period protection that disappears under clothes - but shows up when it counts.
Please click here to discover your perfect fit.
We aim to send all orders out by the next working day.
USA: 5-7 working days
Canada & Mexico: 5-10 working days
Europe: 5-10 working days
Rest of the World: 5-15 working days
Please visit our shipping page here to find out more.
Enjoy complimentary shipping on orders over $50.
If you need to make a change within 30 days of receiving your order, we offer exchanges for a different size or style, or you can opt for store credit. Please note, we do not offer refunds on underwear purchases.