It could be smaller. But it might be that it doesn't get quite as hard. Although it gets pretty hard just before I cum, it is mostly hard but not aching hard, and then just before I feel the cum, I can feel it get harder. Since my cock is in my hand, I know what it is doing.
over all it seems to be about 1/2 inch shorter, but that might be because I have an extra half inch of body fat.
My ball sack is bigger. My actual testicles seem about the same size as earlier. Pretty small, but there is some stuff around each one that makes them look bigger. A few years ago I got an infection in the surrounding tissue which swelled up a lot. It never seemed to have returned to its normal size