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Not really, it comes from a small strip of paper that a colleague has on =
his cubicle wall that contains a variety of conversions and factors he =
has found useful (like metric paper sizes). I just read off the =
dimensions on it. They are easily calculated by doing the =
imperial-metric conversion, and IIRC they require a touch of rounding as =
well. By looking at data sheets that come from European companies it is =
easy enough to find the "offical" size names, but I guess there is a =
standard for them somewhere. The rounding normally doesn't matter =
because the solder pads are significantly larger than the amount of =
rounding anyway.

>Can you scan and post that chart?  Or say where it came from?  Or did =
you
>just make it yourself?

>> The chart I have here says
>>
>> 0402    1005
>> 0603    1608
>> 0805    2012
>> 1206    3216
>> 1210    3225
>> 1812    4532
>> 1825    4564
>> 2512    6432


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