One sleeve changes the entire geometry of a dress. It pulls the eye diagonally, creates asymmetry that reads as intentional and interesting, and adds a sculptural quality that a standard cut simply cannot replicate. We are genuinely fond of asymmetric sleeve dresses because they do the work of an accessory while being structurally part of the garment itself. There is nothing fussy about them. One strong sleeve, worn well, is a complete statement.
What we have been careful about in this edit is construction. A single sleeve only works when the neckline and shoulder are cut with real precision, otherwise the whole thing looks unfinished rather than considered. These are the dresses where the extra layer earns its place rather than just existing for effect.
They work across occasions too, which matters. An asymmetric sleeve lifts a midi for an evening out and gives a simple bodycon dress genuine edge. We have pulled together the styles we keep returning to, across fabrics, sleeve shapes, and lengths. A single sleeve is not a detail. It is the whole argument of the dress.