The Chicest Women I Know All Get Their Summer Dresses From This High-Street Brand—These 5 Styles Are Selling Fast

The ease of the spring and summer months can be summed up in a great dress. Simply thrown on with a pair of sandals and a summer basket bag can result in an instantly polished look in under five minutes, giving us as much time as possible to soak up the sunshine when it arrives. With summer on its way, bolstering my dress collection is at the forefront of my mind, and with a series of sightings of stylish people as well as recommendations from my fellow editors, I knew that COS should be my first stop.

COS is well-renowned amongst fashion people for bringing expensive-looking pieces to the high street. From the perfect white Tee to exquisitely tailored trousers, the brand brings a keen eye for detail at every turn. Now that the summer months are on the horizon, COS has launched its new collection with a series of sleek dresses that exude elegance and timelessness, whether you're seeking out the ultimate throw-on maxi dress or a sweet mini dress for the warmest days.

Yesterday, I decided to test COS's new arrivals in person. After hours in the changing room, I found that five styles impressed me the most, from the expert proportions to the classic colourways, and yes, a few did end up joining my forever wardrobe. For COS, it's not just about an elegant design but also about high-quality fabrics, contemporary details that outlast shifting trends, and a high-end feel at affordable prices. Whether your office looks need a summery update or you're starting your packing list for your next trip abroad, you'll want to explore COS's best summer dresses below.

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Shop the Best Summer Dresses at COS Right Now

1. COS Dropped-Hem Maxi Dress

Style Notes: Whether heading to the beach or the office, this refined dress is one that will always rise to the challenge. COS brings a touch of elegance to a relaxed silhouette with a high neckline and dropped hem. Simply style with leather sandals and a basket bag for day, or take to evening with sequin mules and a colourful clutch.

2. COS Embroidered Midi Dress

Style Notes: There's a reason why shirt dresses come back every year—they're consistently classic. For summer 2026, COS updates the enduring style with intricate embroidered details on the sleeves and skirt, bringing a summery edge to the perennial style. The longer length sleeves and sharp collar add to the polished feel of this dress.

3. COS Jersey-Panelled Mini Dres

Style Notes: I've already spotted stylish Londoners wearing this sweet mini dress, styled with everything from colourful trainers to simple ballet flats. The dress is formed with a technical nylon front panel which is offset with a cotton-jersey back. The a-line shape is easy and relaxed for the warmer months, and I'm already planning all the ways I'll be restyling it throughout the season.

4. COS A-Line Maxi Dress

Style Notes: COS has a series of best-sellers that it brings back every single year, and this dress is one of them. For summer 2026, the easy, loose style comes in a deep burgundy shade as well as a refined navy version.

5. COS Twist-Detail Midi Dress

Style Notes: If you're looking for a style that can easily transfer from day to night, this is the dress for you. The sleek twist detail brings a contemporary update to the reliable fitted dress, and can be paired with simple flip-flops or elevated with mules for elegant evenings out.

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