Need help with ring height

[707electrician]

Im about to order a Vortex Viper 6.5-20x50mm and EGW 20MOA base for my R700 and I am going to get another pair of weaver 6-hole tactical rings but I have no idea what height to get because I can't find the dimensions on either the base or the rings. I obviously want to keep the scope as low as possible and I would also like to be able to fit the Viper sunshade if I get one