Yep, 16.25 mm to be precise. Here http://ec.europa.eu/economy_finance/images/image8583.gif is one from Spain for example. Wish we would do away with those 1 and 2 ct pieces though. The Russian 1 kopek coin http://www.cbr.ru/eng/bank-notes_coins/coins/Coins_97/97_1k_R.gif is small too: diameter 15.5 mm. As far as I know, the central bank plans to phase these, and the 5 kopek pieces, out soon ... Christian
By diameter: U.S Type I $1 gold By original issue weight: U.S. 90% three-cent piece By original issue buying power: Either a modern Canadian 1-cent piece or a Maltese 1/3rd of a farthing.
An ancient Chinese ban liang coin cast during the transition period (circa 200 BC) from the Qin Dynasty to the Western Han Dynasty. This coin is only 5 mm in diameter and weighs just 0.12 gram. Gary
Here are a couple coins from my collection. These are two specimens from SERBIA. The first is a silver Dinar measuring 13mm issued under Prince: Stefan Lazarevic Hrebeljanovic 1389-1402 AD. The second is a Aspra measuring 10mm issued under Despot: Djuradj Brankovic 1427-1456 AD. SERBIA~AR Dinar 1389-1402 AD SERBIA (DESPOTATE)~AR Aspra 1427-1456 AD
Actually, it's silver. I captured these images with my camera, and it's difficult for me to get the toning accurate.
I love the silver 3 cent pieces...for some reason I didn't even think of them when I made this thread!
Phocaea, Ionia, 6th century BC, a hair under 5mm, 0.1g, probably a quarter obol but I'm uncertain on this point.