For chain mail knitting:
For the yarn amounts--
Depending on the size, this http://www.lionbrand.com/patterns/80...tml?noImages=0
takes 10 -14 of 85g balls, which are 103 yds per ball, in other words, 1000 - 1500 yds. So depending on the yardage you get from the yarn you want to use, you could figure from there.