The dude sweater

Help. I think this is going to be way too big. It says to cast on 111 stitches, but this is bulky wool. For my size I would think it would be 70 stitches. Any advice?

The sweater is knit in 1x1 rib throughout. The gauge is 21sts and 21 rows to 4 inches in 1x1 rib so at that gauge, 111sts is 21 inches for the back or a chest measurement of 42 inches.

I am working on this right now. I have frogged it 3 times!

Ugh, never fun to have to do that. Good luck with the current version.