The England international tore his thigh against Everton, and has revealed the extent of the injury that has prevented him from playing for the Canaries since November
Ruddy tore his thigh against the Toffees eight weeks ago, having made 14 appearances for the Canaries before the injury, and has outlined what happened when it tore.
"I ruptured my thigh, the top muscle. It basically ripped off the bone," he told BBC Radio Norfolk.
"I had the operation a week later. It all went very well. I had three and a half weeks off twiddling my thumbs."
Ruddy made his debut for England against Italy in August, and has been in rehabilitation from his latest knock, which he says is going according to plan.
"Now I'm back and I'm making really good progress," he added.
"The brace comes off [on Friday]. I started quad loading this week and we're really happy with how it's gone.
"I see the team every day, but I'm not doing any work with them. They're busy out in the snow and I'm in the nice warm environment of the gym.
"I'm with the physios mostly and making sure I'm fitter and stronger when I come back."