My Black Watch kilt was originally 24" length and worn for formal wear but the selvedging frayed over the years and when I got it back from repair I found that the tailor had shortened it to 22" and put a hem on it. I nearly handed it in to a thrift shop but decided to give it a repreive and I can still wear it as a casual kilt, worn low at the waist and supported by a trouser belt, in which case the hemline hits to the middle of the kneecap.