A hemline is a continuous variable that behaves like a discrete one. There are four lengths worth planning around, and the awkward zones between them are awkward for structural reasons rather than fashionable ones.
The four lengths
- Above the knee: reliable, because it ends at the narrowest visible part of the leg. Needs no help.
- At the knee: needs the hem to finish at or just above the kneecap, not below it. One inch decides this.
- Mid-calf: the difficult one. Works when the shoe tone continues the hem tone, and rarely otherwise.Footnote 1
- Floor length: the most forgiving of all, provided the hem genuinely clears the floor in the shoes you will wear.
The between-lengths (just below the knee, just above the ankle) are not forbidden. They simply require the rest of the outfit to compensate, and there is rarely a good reason to spend that effort when moving the hem an inch would have resolved it.





