FX Sabre TRS rail, Impact M4, how tall rings for EO Titan 5-25x56?

Im thinking about buying the rail, and wondering how tall rings I would need.. So I dont have the rail.
I have a Saber Tactical rail on my 30 cal M3. It does a nice job at protecting the shroud and is a nice piece of CNC work.

I already had 3 scopes, each with 50 mm objectives and extra Vortex rings of various heights so I mounted the rail and used the quarter stack trick to chose the rings.

I have since mounted an MTC Prismatic and did not add the old scope and rings to the rifles spread sheet.

So I apologize for no longer having the information you requested.
 
Im thinking about buying the rail, and wondering how tall rings I would need.. So I dont have the rail.
Then it is still easy to use @Troy Bakel idea. That rail is a flat top no drop… so you can just measure on a table. I use a stack of paper instead of coins, but anything that is small and can lift the scope works.

My flattop rails, for 34mm and 56mm bell with caps, I use 1.375” at least.