As nouns the difference between miniskirt and micromini
is that miniskirt is a short skirt with the hemline well above the knee, generally at mid-thigh level while micromini is a very short miniskirt.
miniskirt
English
Noun
(
en noun)
A short skirt with the hemline well above the knee, generally at mid-thigh level.
micromini
English
Noun
(
en noun)
A very short miniskirt.
*{{quote-news, year=2007, date=February 4, author=Alex Williams, title=A Whole New World, work=New York Times citation
, passage=On the dance floor, a woman in a
micromini apparently forgot she was supposed to be elegant. }}