A square neckline does something very specific and very good for the collarbone area. It creates a clean horizontal line that frames everything above it beautifully. It’s one of those necklines that photographs particularly well, which is partly why it’s been so popular over the past few years. Good news is it also looks brilliant in real life. We’ve pulled together square neck dresses across lengths and fabrics because this is a neckline that works in summer cotton and in winter velvet and in everything in between.