I think, by this point, we're all aware of how great it is to have COS as a part of our great British high street. Whether you're a super-fan whose wardrobe only consists of the brand's minimalist designs or simply someone who pops in when you're in need of a perfect white T-shirt. Since it landed on our shores back in 2007, COS has managed to become the arbiter of understated style, expensive-looking basics and a haven for capsule wardrobe staples—all at the more affordable end of the spectrum. And that's the key to its success—COS has been democratising the "quiet luxury" aesthetic for many years before that phrase was on everyone's lips. It's where everyone from editors and A-list celebrities, to my mum turns if they want to find quality classics that are design-led and anything but boring.
Francesca wears the oversized shirt by COS.
Here at Who What Wear, we have access to a whole heap of data that means we can really see what people are shopping (not just on our Instagram feeds). This way we get a genuine idea of the hero buys that are truly worth the money, and unsurprisingly COS is one of the brands that consistently crops up in these best seller lists. And so, since we all want to know the buys that have been backed by the hard evidence of other people's trust, I thought it would be insightful to share with you the brand's most popular buys of 2025 so far (yes, just a month and a bit in!). From hero basics that you've probably been searching for, like perfect vests, T-shirts and shirts, to cult items like that studio bowling bag, and those wide-leg trousers—they're all in this list. As you'd expect, though, everything shares the signature COS characteristics, making them versatile, timeless investments you're unlikely to regret.
Keep scrolling to see and shop the top 15 COS best sellers of 2025 so far...
THE 15 BEST-SELLING COS BUYS OF 2025 SO FAR
1. Chunky Pure Cashmere Crew-Neck Jumper
2. Column Straight-Leg Jeans
These have already been seen on so many of the most stylish people out there, and is the perfect dark-wash to see us through winter and into early spring.
3. The Clean Cut T-Shirt
This comes in so many colours and prints but thank you, COS, for the perfect white tee..
4. Tailored Pima Cotton Shirt
Simple, versatile and timeless. What more could you want?
5. Arch Jeans
Honestly, we all love these jeans. Don't believe me? Read our thoughts here...
6. Ribbed Tank Top
A tank is an essential layering item.
7. Studio Bowling Bag
The WWW team loved the original leather bowling bag, but we're even more in love with the suede iteration.
8. Wide-Leg Tailored Twill Trousers
Is there anything more timeless than a tailored trouser? COS' bestselling style is back in stock and now in a new mole colourway.
9. Crew Neck Merino Wool Top
When you're looking for chic looks during the transitional period, layering tops are always the answer.
10. Long Capri Leggings
These are already proving to be a sell-out!
11. Balloon-Hem Maxi Skirt
What a skirt!
12. Reversible Leather Belt
This could easily pass for designer.
13. Oversized Tailored Shirt
I have no doubt you'll want to wear this comfortable yet smart shirt on repeat.
14. Chunky Pure Cashmere Turtleneck Jumper
If, like me, you thought green couldn't look expensive, then let this jumper change your mind. Elegant and sophisticated, this is a real beauty.
15. Leopard-Print Pony Hair Ballet Flats
I am in love!
Shop More COS Buys We Love:
A layering hero.
Very chic.
These just look so chic.
So elegant.
The temperatures are about to drop, so why not consider investing in a warming shearling jacket?
A fantastic price for a tote you'll love and wear forever.
COS knows all about creating a minimalist forever accessory.
This could easily be three times the price.
A fun update on the classic wide-leg trousers.
The cloud-soft fabric is what sold it for us.
The roomy fit adds the elegant edge.
Nothing says winter quite like a black midi skirt.
Stunning.
No capsule wardrobe is complete without a denim shirt in my opinion!
These look so comfy.
This is such a chic transitional jacket.
Just stunning!
Comfy and cool in equal measure.
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