When to go to a larger cylinder?

Hello…kind of new to pumping. I currently have a 7”L x 2.25 inside diameter pump. When I am pumping my penis is at the end of the cylinder which leaves me a deep circular indention from the coupler when I stop. Also since I have a prominent mushroom head, the sides of my glans are pressed hard up against the sides of the cylinder, but the underside of my glans and my shaft still has some room on each side. With this would going to a larger size cylinder do me any good and increase any future growth I might see? thxs

Well you certainly need a longer cylinder. Im not sure you need a cyclinder with greater girth though.

If you are not experiencing any painful sqeezing with the girth aspect, it might be worth staying with 2.25ins. Unless you have made big girth gains since starting to pump. Then is the time to go for greater girth. .

With greater girth you may need a higher vacuum to keep the tube from ‘falling off’ which could have undesirable water build-up.