Welcome! The size for the rim should be on the Tire 33-12.5-15
15 would be your rim size.
Post pics of the jeep and many on here will be able to tell you much more.
For example the rims, the type of lift, any upgrades you have and a little more about your rig! The more pics you post the more info you will get! your lift is probably 3-4.5 inches but I cannot tell you with out any pictures.
Good luck! Look forward to seeing your future posts!