Women's organic cotton bralette in black

Super soft, comfy and elegant bralette in Classic Black

A pretty and gentle style providing light and smooth support all day long. Our smoothest design is super versatile and easy to wear.

Classic Black makes the perfect addition to any underwear drawer.

Light and wide chest band without a clasp for a smooth, pull-on style
No seam, triangle shaped cups for a flattering V shaped neckline and lighter coverage
Slim straps cut in one piece from cups to ensure no digging in. Adjustable straps can be crossed over at the back to alter fit slightly.
Super light and natural under clothes with a slight lift
Light support and unbelievably comfortable, this style is great for stylish lounging and for smaller chest sizes.

Available in 4 sizes, we recommend sizing down if you are in between sizes as the fabric will soften slightly over time.

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

Each Y.O.U bralette saves:

87 litres of water

37 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.

THE FIT

This bralette celebrates your natural shape with light, confident support. Offering just the right amount of coverage, it’s ideal for smaller chest sizes or for days when comfort is everything.

The seamless cups create a smooth, flattering fit that doesn’t dig in, while the adjustable straps stay secure without pulling, allowing you to move freely all day.

Made from super-soft organic cotton, this bralette is breathable and feels like a second skin. Whether you’re lounging or layering, it keeps you comfortable and confident.

If you’re between sizes, we recommend sizing up for the best fit.

THE CUT

Our Bralette Style is all about feeling effortlessly beautiful and confident no matter your outfit.

With a soft plunge neckline and delicate triangle shape, it’s perfect for wearing under lower-cut tops or adding a touch of elegance to your day.

The wide, smooth band provides a secure, no-fuss fit in a pull-on style—no clasps, no discomfort, just complete ease. Lightly scalloped cups add a feminine, natural shape, while slim, adjustable straps give you flexibility.

Wear the straps straight or cross them at the back for a subtle lift that empowers you to feel your best.

The Fabric

Crafted from 95% GOTS Certified organic cotton and 5% elastane, this bralette combines natural softness with a gentle stretch that moves with you.

Sustainably sourced and free from harmful chemicals, this organic cotton is ideal for sensitive skin and reflects our commitment to eco-friendly, ethical fashion. Pre-washed for durability, it maintains its shape and softness over time.

For long-lasting quality, machine wash at 30°C and air dry to help minimise environmental impact.

Orders over £60 qualify for free UK delivery

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

I really wanted to love this but...

I 'visited' this bralette online for ages, deliberating whether or not to buy, as it was more than I really wanted to pay. Finally, I cracked, and ordered. I really wanted it to be my holy grail of underwear - ethical company, organic cotton, good looking; ticking all the boxes. Sadly, it's not proved to be the one for me. It's gorgeous soft cotton, but doesn't have enough sideways stretch - getting it on over my head involves a workout, and much wriggling. As a small busted woman, it flattens my chest almost completely. I do a lot of sport and exercise, and it rode up too easily. I really want to love it, but it's not to be. (Thankfully my daughter has tried it and likes it, so I've gifted it to her.) I can't fault the service and quality though, so feel a bit bad giving the three star rating, but I was a bit surprised at the lack of stretch; anyone with mobility issues would really struggle. If it had a back fastening it would work, but as an over the head bralette, not so much.

Hi Sheridan, many thanks for your review and honesty about how you found the bralette. I'm pleased you like our business ethics, service and the soft organic cotton, but was really sorry to hear that the bralette didn't work for you. We do offer fuss-free exchanges or returns if items have just been tried on, but I'm pleased that you were able to give the bralette to your daughter on this occasion and that she likes it. We are actually in the process of designing a new style of bra that will have more shaping, offer more support and have additional features such as an adjustable back strap, so hopefully this will address some of the difficulties you mentioned - and may even be the future bra for you :) I will keep you posted as we get that and please let me know if I can help with anything else. Thanks again and best wishes, Sarah

Just lovely

This bralette is very comfortable and soft, in fact you hardly know you’re wearing it. I will be buying different colours and matching bikini panties, which are super comfy too. Thank you.

Good quality bra

Really good quality, flattening bra. I’ve had the bra perhaps a year and a half now, and there’s no sigh of any wear. It’s really soft too.

Thank you so much for this great review Chelsea. I'm really pleased that you like your bra and that it's lasted so well. Thanks again for your support. Sarah

Soft, super-comfy and supportive

Just took delivery of this - had to try it on straight away!! The cotton is super-soft, the style is lovely and offers a little more support than other organic cotton, non-wired bras I have tried. It even gave me a bit of a cleavage!!
Really love it and will be buying more!
Thank you too for the lovely personal note included - really appreciated!

Charlotte, many thanks for your lovely review! I am so pleased you like our bralettes and I really appreciate you taking the time to get in touch with us. The feedback is really helpful to us and we couldn't do this without your support, so thank you! Best wishes, Sarah x

Great product

Thank you so much for the beautiful bralet - it fits so well & is super soft:) I bought it whilst I was at the zero waste Xmas market in Hoxton. What a lovely product and lovely mission.

Women's organic cotton bralette in black

Women's organic cotton bralette in black

Customer Reviews