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2.
A measurment used on women's pants, shorts, skirts, and jeans. Traditionally a size 0 is a 23 inch waist, but sometimes it may be a 22 or 24. This size is considered ideal in the world of high fashion modeling, and most women don't naturally have this so they often go to extreme lengths to achieve this.There is one size smaller, the 00, but many clothing companies don't carry this size, just size 0.
It's often told that being a size 0 is the eqivalent of being beautiful if you are female.
by starsinthetwilight February 19, 2009
 
1.
The smallest size (to 00) for womens clothing. Typically you have a 22 to 24 inch waist to fit into this size. Some stores suck and don't carry it.
I wear a size 0 in jeans.
by L0VE January 21, 2006
 
3.
Size 0 is the hollywood/fashion world tag & label for ANOREXIA.
Like the way the media tags nicole richie as being a 'size 0' celeb. They actually mean she's anorexic.
by Hopeeee September 12, 2007