It's just a box shaped bag but it is taking fashionistas around the world by storm. 

Not only have they been commonplace on the catwalks from spring/summer right through to winter but Alexa Chung has a Dolce & Gabbana one that she literally wears to death.

These quirky little accessories can add a vintage and eclectic vibe to any look and the real bonus is that they translate easily from day to night. 

For a grown up night-time outfit, pair your box bag with a tailored silhouette or any throwback piece for that matter. For added cuteness, make like Suki Waterhouse and match that lippie to your box bag.

For a more formal casual look, try a softer shaped box bag with a strap and pair with a fitted blazer. Taylor Swift knows what's up. 

Or make like Alexa and opt for the ultimate in casual cool.

Wear your box bag with distressed denim, a slouchy jumper or printed T-shirt and finish with a pair of trainers. Perfecto.  

Think INSIDE the box, with these bad boys: