Well, I weighed a buck 54 there in that photo, and my arms were only about 14.5 inches, but as of now I weigh bout a buck 70 and my arms are 15.75 inches, so I guess that it may be possible to have 17 inchers if I'm at God's limit: 165 to 170 at sub-6. Now my bodyfat is probably around 14 to 15% in the high 160s, so if I can "transform myself" and stay at my same weight, but lose nearly 10 percentage points of bodyfat, then yeah, I think that 17 inch arms are possible. FYI, the ONLY bodypart that I trained hard and consistantly at that time was my chest.