Days of the Week Organic Cotton Underwear

A week's worth of comfort with our 7 pack of classic colours.

Update your underwear drawer with our 7 day multi-pack, offering you a new colour every day! Choose your favourite from our range of styles. Save £2 a pair!

Sleek and stylish low rise thong design that flows with your natural curves. Think playful, soft, and breathable all at the same time!

Our lightest cut sits low on the waist and high on the bottom
Minimal coverage for barely there comfort, perfect for an invisible pants line without digging in
Can be worn sitting on the hips or pulled up slightly for a more ‘V’ shape
No internal labels for a smooth fit and no VPL!

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

This pack includes: Black, White, Light Grey, Navy Blue, Light Pink, Almond and Chestnut.

We donate 6 pairs of underwear to Smalls For All and £1 to breast cancer charity Future Dreams when you buy this 7 pack.

This pack of 7 saves:

245 litres of water

105 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

Days of the Week Organic Cotton Underwear - pack of 7 thongs

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