It appears that the MIL reticle is 5 mils per dot -- from center to first dot on the right or left, and next dot, etc. There are clues in the phone app about the reticle, but no subtension diagram you typically find on a reticle. I did verify a target board that was scope reticle 10 MIL wide, and it matched in the Sig reticle to the dots/hashes on each side of the dot.