His veins are the size of most peoples biceps 
Veins coming with Age + when your Bodyweight was a Long time very high, and you loss some weight, the veins still stay the same size for a Long time.
I´m one year older than Ronny, and my bodyweight between 35-50 Years was never below 275 lbs (up to 33o lbs.). Now i´m 259-260 lbs, but the veins have the same size....but not the muscles (sad Thing)