Top Definition
1. Looking at a woman's breasts and being able to tell her cup and bra size
<woman takes off her shirt>

woman:are you good at sight sizing, sir?

man:why yes i actually am. you are about a 34a, right?

woman:thats right. howd you guess?

man:im good at sight sizing.
by Fandangoooooooo September 03, 2006
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