Found this set on eBay not too long ago:
Each one measures about 1.5 inches in diameter. Good quality, too, and cheap; including shipping, I paid maybe $5.00 total. Snapped 'em up without stopping to think about it.
Note that these are not "official" Foster's merchandise, which is why this thread is down here instead of in the Company Store section. You can tell they're not "official" because the set includes Frankie, Madame Foster, and Mr. Herriman, and there's no sign of Cheese anywhere.