It's been exactly one month after my revision circumcision. No more open wounds. But with full erection it seems shorter because the skin under the tummy is pulled forward to compensate.
Basically imagine the same pressure you do when you dig as deep as possible in your partner. Push down and back towards the pubic bone. 30 seconds hold x 5 reps, every other day. Works best with full erection.
Why every other day? Because you need the tissues to have time adapt to the stretch stress.
flickr.com/photos/189301359...
You can also do a different approach with a fully flaccid penis. Since the issue here is just the skin burrying the penis during erection, how about when flaccid: just pull the skin of the penis forward. Hold for 30 secs, repeat 5 times, every other day.