You've probably heard of the 'Wrong Shoe' theory. But just in case you need a refresher, the viral hack was coined by LA stylist and wardrobe consultant Allison Bornstein, whose smart styling strategies have made her one of the most followed fashion personalities on TikTok.

Her theory is all about creating an unexpected point of contrast in your outfit by deliberately mismatching your shoe — for example teaming sneakers with a midi skirt, or kitten heels with a trench coat.

Watch: Leigh Campbell explains the Wrong Shoe theory. Post continues below.

Bornstein says making your shoe an "intentional choice" rather than purely a functional one will bring personality to your look.

The trend has resonated widely, giving us an instant way to upgrade our style without the need to spend on new items.

@allisonbornstein6

how to make your look feek styled and intentional….. stylist stylingtips sneakers summerstyle @Lucy Williams @Lauren Chan @Kendall Jenner @Imani Randolph

♬ original sound - Allison Bornstein

And now it's coming for another accessory: your handbag.

For decades, we've been told that a good-quality handbag is one of the best investments you can make in your wardrobe. They go with everything, right? Whether it's a casual look, a work fit or evening wear, a designer tote is your fast ticket to adding instant polish.

But the caveat is that you have to spend significant coin on a high-end bag. And not everyone has that luxury.

The Wrong Bag theory might just save you money in this department, because statement bags have never been more on-trend or accessible.

We've already seen those cute handbag charms and Labubu keyrings explode in popularity, and the trend for colourful faux fur bags is everywhere.

Next, we'll start to see Bohemian styles have their moment, with studded suede hobos, beaded baguettes and large woven totes.

Theoretically, anything can be classified as a 'wrong bag', depending what you pair it with. But here are a few helpful suggestions when it comes to styling them.

If you're dashing out in a loungewear look, think about adding a sleek leather shoulder bag or metallic crossbody to elevate comfy separates.

Rozalia Russian pairs a sleek bag with her athleisure look. Image: Instagram/@rozalia_russian.

A fluffy textured bag stands out against a basic look, like jeans and a neutral coat. It's all about the unexpected contrast.

French influencer Cindy of 'Boho Addict' styles a fluffy bag with casualwear. Image: Instagram/@boho_addict.

A Boho bag or oversized tote can bring that eye-catching clashing element to your day-to-day separates.

British influencer Polly Sayer clashes her tote bag. Image: Instagram/@pollyvsayer

Byron Bay influencer Irene Sacristan pairs a boho tote with sporty separates. Image: Instagram/@nerii_xx.

The truly great thing about the Wrong Bag? It doesn't matter if your tote is designer or something you snagged at a flea market.

The high street is full of lower-cost options that are big on impact without costing a bomb. Shop our favourites below.

Shop statement bags.

Cos Quilted Mini Bag, $89.

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Gorman Sparkle Crossbody Bag, $79.

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Prene The Holiday Large Woven Tote, $219.

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Arms of Eve India Handbag, $99.

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Summery Copenhagen Taci Mini Bag, was $129, now $38.

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Zara Beaded Tote Bag, $105.

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The Somewhere Co. Cobalt Marshmallow Midi Tote, $100.

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Feature image: Instagram/@boho_addict; @pollyvsayer; @nerii_xx