Square necklines are having a moment and rightly so: they're an easy shortcut to making a long-sleeved top more stylish. For a chic look, stick to plain black or white and team with jeans and gold jewellery. From H&M to Reformation, here are some of our favourites...

Shop new arrivals like oversized sweaters, vests, ribbed tank tops, tees and so much more. We've got every option for all your needs.

Reformation makes sustainable tops for women, too – shirts, soft graphic tees, cute crop tops, sexy bodysuits, and frilly blouses.

Buy Verdusa Women's Casual Square Neck Sleeveless Slim Fitted Basic Tank Top and other Tanks & Camis at Amazon.com. Our wide selection is elegible for free shipping and free returns.

Style: Casual/Vintage Fabric Content: Polyester Fit Type: Slim Fit Neckline: Square Neck Sleeve Length: Long Sleeve Unique and stylish design: The casual/vintage style of this top, combined with the elegant square neckline and flare sleeves, creates a unique and fashionable look that sets you apart from the crowd. Versatile and easy to style: This slim fit top can be easily dressed up or down, making it suitable for various occasions. Pair it with jeans for a casual day out, or with a skirt…

DIY Square Sweetheart Neckline Top: There are truly so many ways you can refashion a basic shirt, and this is one of my favorite. Give a basic shirt some 90s vibes with this simple DIY transformation. Here's how to turn a regular top into a square sweetheart neckline top in just a few…