I understand the convenience of using coins to demonstrate the size of an item.  Everybody knows what a coin is.  This makes such a common item for comparing sizes a popular choice.  Unfortunately, it’s  all too often an inaccurate means of measuring an action figure.  Coins of an international origin can be different sizes and multiple different sized coins can complicate gauging the size of a figure.

To this end, this article explores the problems inherently present with using coins (and by extension, other common objects) to measure the size of action figures; and the size of anything else, really.

-Windebieste.