Ah thanks, very interesting. This part was telling: "Precision dice with rounded (or cut) corners are recommended where a limited rolling area is available, t

Ah thanks, very interesting. This part was telling: "Precision dice with rounded (or cut) corners are recommended where a limited rolling area is available, the cut corners allow the dice to tumble, in particular the smallest size of 1/2 inch (13 mm) are becoming increasingly used by many RPG gamers." I didn't think about backgammon being a small dice rolling area, but that makes total sense.