Reply To: How Much Below the Knee Should a Skirt be?

The 4in (10 cm) comes from how much your skirt will move up your leg when you sit down compared to when you are standing up so that your knees will still be covered. Try it out. Put on a skirt that comes to 2-3 cm below your knee when you’re standing and see what happens when you sit down. Compare it to a longer skirt. This all varies whether the skirt is flared or straight, but you can get a better picture. So if you hold that your knee has to be covered at all times, then maybe you should consider this halacha.