Scope Ring Size

[strathero47]

Would anybody know of the scope ring sizes for:
3-9x40
3-9x50
3-9x56E

[mcoupe11]

You're going to have to be a lot more specific than that. What brand or model of scope are you interested in?

You should realize that, once you've answered that question, the tube diameter is probably only a Google search away.

[AustinWolv]

In addition, your local gun shops or even Academy can help answer your question if you are willing to visit and possibly take your scope in.