Hi Rich,
Here is what I found. I ordered 250 and find they work well. You can even put the white or black edging inside the rim, but they don't come with it.

X43.6 (most $10 casino strikes) - Case (250 Count)

$10 silver strikes fit perfectly into the center. the case is the size of the clam shell used later in the casinos, but holds the strike better. They sell in bulk and have many sizes to chose from.
Happy Strikin'

http://valleycoin.com/
Craig Johnson
ValleyCoin.com
5525 34th Ave North, Crystal MN 55422
Tollfree: 877.875.0786, Voice: 763.513.9900, Fax: 763.513.9901