If it still says ‘Add to cart’, your size is still in stock — once it’s gone, it’s gone.
Step into every room with the quiet confidence of a woman who knows her worth.
The Cosima jumpsuit is your passport to those unforgettable evenings where conversation flows as freely as champagne. Whether you're dancing under fairy lights at a garden soirée or commanding attention at a rooftop cocktail hour, this piece moves with you—graceful, fluid, utterly magnetic. Slip it on and feel the world shift just a little in your favour.
Why You'll Love It:
• Strapless silhouette: a daring neckline that frames your shoulders and celebrates your natural elegance
• Wide-leg cut: flowing lines that elongate your frame and give you room to breathe, move, and own the moment
• Delicate chiffon: lightweight and whisper-soft, designed to catch the breeze and every admiring glance
• Versatile palette: available in classic Green, White, and Black to suit your mood and every occasion on your calendar
Because some moments deserve more than an outfit—they deserve a feeling.
Size Guide
| UK | EU | US | Bust (cm) | Waist (cm) | Hips (cm) |
|---|---|---|---|---|---|
| UK 6 | EU 34 | US 2 | 81 | 63 | 88 |
| UK 8 | EU 36 | US 4 | 84 | 66 | 91 |
| UK 10 | EU 38 | US 6 | 89 | 71 | 96 |
| UK 12 | EU 40 | US 8 | 94 | 76 | 101 |
| UK 14 | EU 42 | US 10 | 99 | 81 | 106 |
| UK 16 | EU 44 | US 12 | 104 | 86 | 111 |
Return and refund period of 14 days:
From the date you received your order, you have 14 days to request a refund. Unfortunately, we cannot offer refunds after these 14 days. You will receive the refund via the same payment method you used for the purchase.
We now offer free shipping for all orders inside the UK.
All orders are being shipped with Royal Mail.
To initiate a return, please contact us at the following email address: support@zeynalondon.com
Return and refund policy: To be eligible for a refund or exchange, the item must be unused and in the same condition in which you received it.
Items that are not in original condition, are damaged or are missing parts (unless due to our fault) cannot be refunded.
Our sizes follow standard measurements
If you normally wear a size L, choose size L.
If you’re between sizes, we suggest going one size up.
Example: Between M and L? Go for L for a more comfortable fit.
Loved by women across the UK
Patricia G.
So many compliments!
Wore mine to my granddaughter's christening and I lost count of how many people asked where it was from. Felt confident the whole day, which doesn't happen as often as it used to. Already having a look at my next one.
Margaret W.
Just like the pictures
The colour and the shape are exactly what's shown on the website, if anything it's nicer once it's on. I've been caught out by other places before now so this made a really nice change. Very happy with it.
Carol S.
Beautiful quality and it's lined
Feels far more expensive than what I paid for it. It's fully lined so nothing goes see through in the light, the stitching is neat and there wasn't a loose thread anywhere. Washed it and it kept its shape lovely too.
Linda P.
True to size
I'm a size 16 and I actually measured myself against their size guide instead of just guessing, and it was spot on. Skims over the tummy and doesn't cling anywhere it shouldn't. Felt lovely and elegant, not squeezed in one bit.
Janet R.
Elegant and never frumpy
I'm 62 and I find most things are either a bit frumpy or clearly made for a twenty year old. This was neither. Covers the tops of my arms, comfy all day long, and I felt like me again. Can't ask for more than that really
Angela T.
Actual real people who reply
I sent a little question before I ordered and a lady called Jennifer got back to me the same day, so warm and helpful she was. Lovely to know there's a real person on the other end if you need one. That's what made me order in the end.
Hilary B.
My second order now
This is my second time ordering from them and they've not let me down yet. Beautifully made, true to size and always turns up nicely packaged. A little shop I actually trust now, which is rare these days.
Denise K.
Comfy all day
Bought these for a wedding and I was worried about my feet but there was no need. True to size, roomy enough for my wider foot, and I was up dancing all night without a single blister. So pleased with them.
Christine M.
No nasty surprises
They kept me posted by email the whole way through and there was nothing extra to pay when it landed on my doorstep. For the money I'll be honest I expected a lot less. Will definitely be ordering again.
Fashion spends its life chasing twenty-somethings. We think it’s looking the wrong way.
Zeyna London dresses the woman in her best chapter — honest UK sizing, real curves, and pieces that show up for the moments that matter.
