looking for advice to go from 22mm onwards.

hey folks. I've been sitting comfortably at 22mn for a couple years. with 30mm always my stretch goal in mind I always felt put off. due to the sites I usually buy from. lacking the sizes I need to work up. stretch it body jewelry have no 24mm in stock. ever. it seems. I have a couple 25mm I've bought however. I just cannot get them in. its too big of a size increase and I don't want to be the guy who comes here with a bleeding and torn ear saying "did i size up too much?"

so I just need advice really. how do I get to 25mm from 22 and work my way to 30 in my own time?

thank you :)