Gramps: One Sleeve + Body Done

Sizing has been tricky...I want to make the sleeves and body long enough to allow some growth, but not so long that it looks like a tunic or girls' sweater.  The first time I tried it on him I thought the sleeves might be a little too narrow (maybe I should do less decreases so they stay wider?) but looking at it again I think they are ok.  I want to finish this pronto so he can wear it before summer!  It is so hard to make a sweater for a growing kid before he grows out of it!