In an earlier post, I talked about the guards in Persian reliefs from Susa who are 17 bricks tall and have spears 19 or 21 bricks tall. Artists often ‘improve’ human proportions according to different ideas of what the well-formed body looks like: these guards are 5 2/3 bearded faces tall (17/3), Cennino Cennini would have them 6 1/2 bearded faces tall (26/4).
When I visited the Louvre in July I had a chance to look at some of those reliefs for the first time since 2016 (a few are on display behind glass in Tehran). As you see, my hand and the hand of the sculpture are about the same size (and I am not particularly tall or short). My hand is slightly closer to the camera than the sculpture is, so it is slightly enlarged.