current distance between centres is 6.2 mm - your's is about 8. so we can make the smaller gear teeth a little longer.

The gears are 2mm thick.
The picture is so blurred I have no clue how thick your gears are :-)

If your camera does not have macro - which it doesn't appear to. then take the picture from further away so it is actually in focus and crop to the part of the image you want. that will always give you a clearer image.

Buy a set of these : http://www.amazon.com/Stainless-Elec...gital+calipers

It'll make life much easier :-)

Postage wise - these things weigh almost nothing. 4 of the larger ones weigh 0.36 grams.
So throw a padded envelope in and p&p should only be few dollars.

I've just been doing the design for fun - but I keep being told I need to charge people for stuff.
We can sort something out I'm sure :-)