Depends on how you want to wear it I guess. If sleeves weren't long on me I'd def be keeping my 5. I get some bunching at the wrists from the sleeves being too long for me. this would be ok if it was a sweatshirt, but it's more of a sweater/knit. I do have short arms, so oversized may be wrong....relaxed would be a better way to describe the sweater.