Size guide
Thong Size Guide: How to Find Your Perfect Fit
Not sure what thong size to order? Our cotton thongs fit a little differently to synthetic styles, since cotton has less stretch – this guide walks you through how to measure yourself and pick the right size for each collection.
How to Measure Yourself for a Thong
Grab a soft tape measure and measure around the fullest part of your hips, keeping the tape parallel to the floor. Stand naturally rather than pulling the tape tight – you want your natural hip measurement, not a squeezed one. Because cotton is less stretchy than synthetic fabrics, we recommend measuring carefully rather than guessing based on your usual size in other brands.
Thong Size Chart
| Size | UK Size | Hips (cm) | Hips (inches) |
|---|---|---|---|
| S (Small) | UK 6 | 82–86cm | 32–34in |
| M (Medium) | UK 8–10 | 87–96cm | 34–38in |
| L (Large) | UK 12–14 | 97–106cm | 38–42in |
We'll be adding more sizes in future, we promise.
Does Sizing Vary Between Collections?
Yes. Collection No. 3 has elastane in the waistband, so we recommend sizing up for a comfortable fit. Collections No. 1 and No. 2 follow the standard chart above.
What Thong Size Am I?
Measure your hips using the steps above and match your measurement to the chart. If you're between two sizes, size up for a more relaxed fit or size down for a snugger one – just bear in mind cotton has less give than synthetic blends, so it won't stretch to fit the way a nylon thong might.
Do Cotton Thongs Run Small?
Not smaller exactly, but less forgiving. Because there's no stretch to rely on beyond the collections with elastane, an accurate hip measurement matters more with cotton than it does with synthetic underwear.
Can Colour Affect Sizing?
Yes – like many clothing and underwear brands, lighter colours tend to use slightly thinner fabric with a touch more stretch than darker colours, due to the dyeing process. The difference is minimal, but worth knowing if you're between sizes.
Will My Cotton Thong Stretch After Wearing?
If a new pair feels slightly snug at first, that's normal – cotton softens and stretches a little after a few wears and washes. Avoid deliberately stretching them, as this can pull at the seams.
Returns
Health and hygiene is paramount for us. Much like many high-street retailers, and to ensure all customers receive products unworn, we operate a no-returns policy for underwear. Please use this guide to check your size carefully before ordering. If your product is faulty, contact hello@cottoncoup.com.
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FAQs
What's my size?
Because cotton is less stretchy than synthetic materials, we may recommend sizing up for Collection Number 3 but sizing down for Collections Number 1 and 2. Please use our size guide quiz for more info.
Does cotton stretch?
If any pairs feel a little tight at first, please note that after a few wears and washes your underwear will soften, stretch and become more supple. Please be careful if intentionally trying to stretch them out as you will pull at the seems.
How do I wash my cotton panties?
Wash on a 30°C cycle and do not tumble dry. Like many fabrics, cotton will only shrink if you wash it on very high temperatures. A bit like denim, cotton can feel a bit tight and stiff when it has first been washed. But, as you wear it, it will loosen up.
How do I take care of my cotton panties?
Treat your cotton with care. Without elastane for stretch, cotton is more fragile. Please do not wring your cotton when wet or wear panty liners as the adhesive pulls at the seems (panty liners defeat the point of your bits breathing too!).
How do I return my item?
Health and hygiene is paramount for us. Much like many high-street retailers and to ensure all of our customers receive products unworn, we have a no returns policy for underwear. If your product is faulty, then please contact hello@cottoncoup.com.
Where is my order?
You will have received a tracking number by email. Please click the tracking number to be linked to a tracking site.
Why is cotton better for my bits?
Cotton underwear is made from the natural fibres of the cotton plant, which are spun into threads and then woven or knit into a breathable fabric, perfect for everyday wear. Unlike underwear made from synthetic fibres, cotton lets your bits breathe. The more breathable the fabric the more air circulation there is down there, keeping your bits fresh. This means your bits can have less odour and bacteria build-up, and a better PH balance. Learn more here
Do you ship internationally?
We do ship internationally. Shipping costs and timings will be calculated at checkout.
Is the packaging sustainable?
All of our packaging, from the outer bag to the individual inner bags, are all biodegradable. Did you know, cotton is also biodegradable too?