I would get the rifle in hand first. Then you can check exactly to see what works for YOU. We all do not agree on what is the best height. I asked for my first one and got a wide range of suggestions and then hated what I picked. I realized then, that you never ask anyone else what height they like, because it is a personal preference.
I like to just use printer paper to help me judge needed ring height, but people use pennies or pop cycle sticks, etc. I’ll use my paper example. I take a stack of paper and put it on top of the rail and then set the scope on it, and address the rifle. Is it low or high? Adjust with less or more paper until you find the height YOU like. Then you will know how high of rings YOU want. You would just need to measure then. You need the measurement from scope rail to middle of scope rings, usually documented in inches. Each company’s low, medium, high are not the same, so that is why you measure and then find the rings that match the needed height.
The final height I settled on and loved was with a 1.5” mount and an aftermarket cheek riser.
