Im 5' 9" and 145 lbs what size board do u...
Im 5' 9" and 145 lbs what size board do u recommend if i mainly jibb but do a couple jumps?
Probably 152-154 but some people like them shorter and some like them longer.
152 would be fine if you aren't growing and easier for jibs than the 154, but stable enough for jumps, but since it is on the softer side, it may not hold up to high speeds as well as the 154, but you said you were mainly doing jibs, so it should be fine for what you want.
I wouldn't recommend the 156 at 145lbs unless you were doing boarder cross or wanted to go really fast.