I can’t stop seeing this high street bag all over Instagram

You know you've found a fashion gem when it looks so expensive you think it's designer, but when you go to buy it you realise it's high street.

So I consider it a public service to tell you about the COS banana bag, which comes in at just £89, and it's real leather too.

It's got a The Row-esque vibe about it, minus the hefty price tag, and seems to go with absolutely everything, from floaty and knitted dresses to suits and t-shirts with jeans.

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LEATHER CROSSBODY BAG - <a href="https://www.prf.hn/click/camref:1011luCpE/pubref:hawk-custom-tracking/destination:https%3A%2F%2Fwww.cosstores.com%2Fen_gbp%2Fwomen%2Faccessories%2Fbags%2Fproduct.leather-crossbody-bag-black.0969585001.html" data-link-merchant="cosstores.com"">£89 at COS
Made from leather, this crossbody bag has an adjustable strap with zip closure. Considered design that works.

I'm clearly not the only person who thinks so, since it's been doing the rounds on Instagram, shot on the likes of Alexis Foreman, Maris Martins and Lucy Alston.

A photo posted by on

A photo posted by on

The bag was so popular, it sold out just before Christmas, however the good news is it's now officially back in stock, and I'm going to buy mine asap, otherwise I know I'll regret it later.

It's a sleek way to carry around your essentials, bridging the gap between casual and dressy, plus it's conveniently hands free.

I'll be wearing mine over my favourite knitted two-piece, paired with chunky boots and a camel coat. The perfect winter get-up for when you're sick of dressing in joggers but not quite ready to get back into your formal workwear.

Penny Goldstone

Penny Goldstone is the Digital Fashion Editor at Marie Claire, covering everything from catwalk trends to royal fashion and the latest high street and Instagram must-haves.

Penny grew up in France and studied languages and law at the Sorbonne Nouvelle University in Paris before moving to the UK for her MA in multimedia journalism at Bournemouth University. She moved to the UK permanently and has never looked back (though she does go back regularly to stock up on cheese and wine).

Although she's always loved fashion - she used to create scrapbooks of her favourite trends and looks, including Sienna Miller and Kate Moss' boho phase - her first job was at MoneySavingExpert.com, sourcing the best deals for everything from restaurants to designer sales.

However she quit after two years to follow her true passion, fashion journalism, and after many years of internships and freelance stints at magazines including Red, Cosmopolitan, Stylist and Good Housekeeping, landed her dream job as the Digital Fashion Editor at Marie Claire UK.

Her favourite part of the job is discovering new brands and meeting designers, and travelling the world to attend events and fashion shows. Seeing her first Chanel runway IRL at Paris Fashion Week was a true pinch-me moment.