I've been on a coin capsuling frenzy (Arkham Horror LCG, Forbidden Stars) and decided to get some for the counters in Orleans. I got a bunch of 22 mm capsules which fit okay, though they didn't fit so well on the beneficial deeds board. 21mm might fit better.
(Note that my counters are from the dlp Games version which fit quite nicely. I noticed while playing the Tasty Minstrel version earlier today at a convention that it has thicker counters.)
For those who don't want to upgrade to the deluxe kit this might be a cheaper option if you can get the capsules for cheap. (Found 50 capsules on ebay for less than GBP 3 pounds).