Your best bet is to measure a sweater that you like the fit of and go with that. Measure the length from the armhole seam down, and measure the length from the armhole up to the shoulder.
"Trust the pattern!"
Time flies like an arrow, but fruit flies like a banana.
Hop aboard while we follow the cloud-covered van of knitting harmony, man!! Woooo!! --Hedgehog
IngridKH on Ravelry