Fins asked me more specifically about BC spots... here is what I told him... thought someone else might be interested...
There are 3 spot sizes...
1/8"
1/4"
1/2"
The configurations are as follows
1/8 x 4 (samurai $1)
1/8 x 8 with 1/8 gaps (samurai $500)
1/8 x 9 (purple Mardi Gras)
1/8 x 12 (samurai $100)
1/4 x 2 (it’s a modified version of 1/4x4)
1/4 x 4 (NJ $5)
1/4 x 6 (samurai $5)
1/4 x 8 (samurai $25)
1/2 x 2 (this is a modified version of 1/2x4 - again they just make some spots the same as the base chip color to achieve the end effect)
1/2 x 3 (samurai $1000 or asm style)
1/2 x 4 (some older mockups of the samurai $1000 were like this)
Lastly, it’s worth noting that all the 1/2" spots are really just 1/4 spots that are the same colors. Also, I would guess that they can probably make a 1/8x2 if you asked them to... Again, just by making 2 of the 1/8x4 the same colors as the base chip...
Bellow is links to images that will show you all of the examples I referenced above... except the samurai chips, you know where to find those...
http://www.pokerchipreviews.com/pix/nevadajack11.jpg
http://www.pokerchipreviews.com/pix/mardigras3.jpg