@KAM: Hey, could you walk me through some of the thinking on having the Peltast Pikes use smaller shields than the Bronze Shields? I've finally gotten around to constructing my own pelte based my readings of the sources and the analysis done in "Invincible Beast" by Christopher Matthew. The first thing that jumped out at me was that there wasn't a lot of wiggle room when it came to the diameter of the shield. In order to have the forearm go through a central porpax, the radius of the shield could not have been any larger than the length of the person's forearm. Or more specifically, the distance from the inner elbow joint to mid palm. Such a radius would allow the wielder to still grasp the pike, use one thumb to loop through the handgrip or antilabe, while still being sufficiently protected by the shield. Additionally, ensuring contact between the shield rim and pike would increase the stability of the shield during combat.
Thus, it seems unlikely that there would have been dramatic differences in shield size for anyone operating in a pike phalanx. The Royal Armor probably had some minor variations to deal with natural size differences between individual forearms, but not sure why that would translate to the Peltasts having noticeably smaller shields.
In summary, I was fine with the unit description right up until I started physically testing things myself, and then questions arose. Any insights you might provide would be greatly appreciated!