Women’s organic cotton low-rise bikini bottoms in black

Essential low-rise comfort in Classic Black

The original pants style has become a bestseller, providing super soft and discrete support all day long, this style is an immediate wardrobe staple.

Medium coverage, sits low on the waist and lightly on the mid hip
Classic bikini cut on the bum, provides good coverage and slight lift for a great fit under jeans without rolling down or bunching up.
Super breathable with light stretch,
No internal labels for a smooth fit and no VPL!

We recommend sizing up if you are between sizes for guaranteed comfort.

For every pair of underwear you buy, we donate one pair to the charity Smalls for All.

Each pair of Y.O.U bikini bottoms saves:

58 litres of water

25 grams of carbon dioxide

View our sizing charts below. If you're in-between sizes, we recommend sizing up for comfort! If you need more specific sizing help, please email us at help@youunderwear.com.

Bralette / More supportive bra / Women's knickers / Men's trunks / Girls' bralettes / Girls' knickers / Loungewear

How to Measure Yourself

Chest band: wrap the tape measure around your body, just under your bust.

Bust: measure the fullest part of your bust.

Waist: measure around your body approximately 5cm below your natural waist where the waistband of trousers normally sit.

Lower hip: wrap the tape measure around the fullest part of your hips and bottom.

Two-Way Strap Bralette:

Bralette Size	UK	Band Width (in)	Band Width (cm)	Fits Bra Sizes (Approx)
XS	8-10	27"	68.5	30 B/C/D - 32 A/B/C
S	10-12	29.5"	75	32 B/C/D - 34 A/B/C
M	12-14	32"	81	34 C/D - 36 A/B/C
L	14-16	34.5"	87.5	36 C/D - 38 A/B

More Supportive Bra:

Bra size	Chest band measurement (inches)	Approx. cup sizes	Approx. UK dress size
Small	28-30"	B, C, D	8- 10
Small +	28-30"	DD, E, F	8- 10
Medium	32-34"	B, C, D	12-14
Medium +	32-34"	DD, E, F	12-14
Large	36-38"	B, C, D	16-18
Large +	36-38"	DD, E, F	16-18
Extra large	40-42"	B, C, D	20-22
Extra large +	40-42"	DD, E, F	20-22

Women's Thongs, Bikinis, and Boy Shorts:

UK Sizes	EU Size	Waist (in)	Waist (cm)	Hips (in)	Hips (cm)
6	34	23-24	58.5 - 61	33	84
8	36	25-26	63.5 - 66	35	89
10	38	27-28	68.5 - 71	37	94
12	40	29-30	73.5 - 76	39	99
14	42	31-32	78.5 - 81	41	104
16	44	33-34	83.5 - 86	43	109
18	46	35-36	88.5 - 91	45	114
20	48	37-38	93.5 - 96	47	119
22	50	39-40	99.5 - 101	49	124

Men's Trunks:

Size	Waist (in)	Waist (cm)	Clothing Size (approx.) (in)	Clothing Size (approx.) (cm)
XS	29-31"	74-79	28-30"	71-76
S	31-33"	79-84	30-32"	76-84
M	33-35"	84-89	32-34"	84-89
L	36-38"	91-97	34-386"	91-97
XL	39-41"	99-104	36-38	91-97
XXL	41-43"	104-109	38-40"	97-109
3XL	43-45"	109-114	40-42"	109-114

Girls' Bralettes:

We feel that there isn’t a set size for bodies at different ages, and we don’t want to put any additional pressure on young girls, so our sizing looks a little different. We have 4 sizes, all named after Ugandan towns! We suggest using band width as a starting point, although do get in touch if you have any specific sizing questions.

Size	Band Width (in)	Band Width (cm)	Fits Ages (Approx.)	Worn By:
Jinja	23	57-58	9-10	Hollie & Amelia, age 9 1/2, band with 23"
Kira	25	63-64	10-11	Help us fill this in ...
Lira	27	68-69	11-14	Liv, age 11. Phoebe & Flora, age 11 1/2. Lana, age 13 1/2, 69cm band width, wears 30B/XS. Beth, age 14.
Masaka	29	73-74	13+	Hannah, 32C

Girls’ Knickers:

Details	Waist (in)	Hips (in)	Ages (Approx.)	Women's equivalent size
Jinja	22-23.5”	25-27”	7-9	4 (EU 32)
Kira	24-25”	30-32”	9-11	6 (EU 34)
Lira	25.5-27”	34-35”	11-13	8 (EU 36)
Masaka	27.5-28.5”	37.5-38.5”	13+	10 (EU 38)

Pyjama bottoms:

Our PJs are designed to be unisex, so the sizing is a bit more flexible with an elasticated waist, cord drawstring and also longer leg length.

Details	Women's sizing (UK)	Men's sizing
XS	6-8-10	28-30" waist
S	10-12-14	30-32” waist
M	14-16-18	34-36” waist
L	18-20-22	38-40" waist

- Stretch-blend organic cotton
- 95% GOTS Certified organic cotton, 5% elastane
- Pre-washed, shrink-resistant fabric

Machine wash, do not tumble dry - we suggest the eco-conscious choice of 30°C.

£2.25 for single items, £3.95 for sets and packs

Free shipping on UK orders over £60
All items posted Royal Mail's Tracked 48 service
International Shipping information is available here

We offer a happiness guaranteed return policy. If you are unhappy for any reason, we offer a fuss-free exchange or refund on all unworn and unwashed items within 30 days of purchase.

Orders over £60 qualify for free UK delivery

Fuss-free exchange or refund on all items within 30 days of purchase

The only pants I’ll ever wear now!

Now that I’ve realised these are the only pants that actually fit me and feel amazing on, I won’t buy from anywhere else. It’s taken me years to find my perfect knickers but I found them in the end. So happy. And supporting a great cause at the same time.

I'm so pleased that you've finally found your perfect knickers Lizzie. Added bonus that they're pants that make a difference to others too! Thank you so much for your support, Sarah

The Holy Grail of Pants

I have been looking for a pair of pants that fit, are comfortable and ethical for years. These tick all the boxes while supporting Smalls for All. The search is over - Thank you!

What an amazing review, thank you so much Kate. I am so pleased your search is over and that you can support Smalls for All whilst having comfy pants. Thank you for your support and kind words, Sarah

My new favourites!

I can’t begin to explain how soft and comfortable these are! They fit really nicely and I can’t wait to purchase a multipack

Thank you so much for this lovely review Georgia! I'm really pleased that these are your new favourite undies and that they are so comfy and fit well. Thanks again for your support.

My favourite pants.

I absolutely LOVE my YOU pants. They are comfy, soft you don’t even notice your wearing any… x

Nice quality

Really nice quality pants and as the description says they fit smoothly which i find especially important under suit trousers for work. For me they come up a bit smaller than expected so i’ll order one size up from my usual size next time.

Women’s organic cotton low-rise bikini bottoms in black

Women’s organic cotton low-rise bikini bottoms in black

Customer Reviews