I doubt ronnie has ever had 25 inch arms in contest shape.
I could see a legit 24 inches at a huge weight of 287 pounds in 2003, but thats it:
because of the high biceps peak and huge posterior triceps head, I could see these arms maybe measuring 24 inches onstage...they are phenominal.
In 2003, Ronnie's arms may have been the best of his career.