The slip dress is the most underestimated thing in a wardrobe and we are prepared to argue that point at length. It looks effortless in a way that takes real skill to pull off, which is exactly why getting the length right matters so much. Too short and it reads as purely casual. Midi and maxi lengths are where the slip dress earns its reputation as something genuinely elegant. There is a particular quality to the way a longer slip moves, that slight drag of fabric, the way it settles when you stand still. It photographs beautifully. It works harder than it looks like it should. We have been pulling together our favourite slip dresses specifically at lengths that suit occasions worth getting dressed for. A dinner where you want to look considered. An event where effort is expected but fussiness is not. A wedding where you want to be well dressed without competing. These are the slips that sit in the midi to maxi range and bring the kind of quiet confidence that louder dresses rarely manage. Length, it turns out, changes everything.