The single button blazer is one of those cuts that looks effortless when it works and slightly off when it doesn’t, and the difference usually comes down to where that button sits. Too low and the lapels splay in a way that reads as an accident rather than a choice. Too high and you lose the elongating line that makes the whole silhouette worth bothering with. We’ve spent time with a lot of these and the ones that actually work share a few things: clean lapel roll, a button positioned at or just above the natural waist, and a chest that doesn’t gap when you move. This is a distinctly modern shape. It works well in linen for warmer months and in a mid weight wool when the temperature drops. It can be dressed up or worn with a good pair of trousers and nothing underneath. The blazers in here have the proportions right. That matters more than anything else.