My overall style is nothing below the knee - mid-thigh is just right except in 'WindChill Factor' extremes of winter.
A picture is worth a thousand words !
Check this LINK out for a pictorial account of skirt length:
http://www.sisterfunbunny.com/
I have one micro-mini that is worn over a bikini speedo type swim suit to keep things all in place and legal.
Definitely not around children except at the beach. The authorities may have some interesting views about what is
considered street; beach and club/dance wear legal and presentable in public. Even if the authorities got it wrong it
would not be worth the hassel and perhaps humiliation in defending your position. Even more so in the 'Redneck'
southern states in the USA.
I do not see how any male could wear a micro-mini without a 'supporting clause' in their contract.
The shortest of my skorts is 12 inches with the enclosed compression shorties.
Most of the skirts and skorts average in the 14-16 inch range perfect for athletic events; golf; tennis; biking or walking.
The kilts are a bit longer 17 to 23.5 inches.
As for the subject of going commando - the standard answer applies "I am not telling" "Get your eyes above belt level" !
"Skirted-Short-I-Like-It-That-Way"
rma