chunky cotton sweater jacket

I *think* this is the first collared sweater I've made. I might try to make a human sized version for myself one day but with the buttons going all the way up the neck. This olive cotton yarn that I bought is too bulky for miniatures. I want to figure out exactly how much yarn I will need to make human sized items, this chart estimates 1170-1690 yards for a crocheted adult sweater with chunky/bulky yarn...hmmm... maybe I should just aim for a vest :) Yeaaah...maybe a vest with a big collar, so it acts like a scarf as well, like the sweater dress I just made for Blythe. This might be a good idea because it will fit easier under my winter coat.