What is the smallest RGB LED I can purchase?

I'm building a hardware product that requires very small RGB LEDs. The smallest I've seen is 0402. Is that the smallest one I can buy?

Thanks in advance,
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I think yes. It is the smallest one that you can buy.
it is called PICOLED-RGB:
which is actually 1mmx1mm named SMD 404
The 402 size is for single color.

Be aware of next aspects:
- they are small, but they take high current , especially red and green 25-30mA. Blue takes always less - for LUMEX is clear in datasheet.
- PICOLED -RGB states only 10mA as normal with peak of 50mA, but the rule with green/red vs blue usually applies.

The size is related with technology, standards, pick and place machines and 402 is a small size, at the limit:
I think it is useless to search smaller. Who would use a smaller SMD size if there is no chance to automate the components placement process?
Eventually you can use any SMD RGB LED and then use a light-guide, as a fiber optic or similar materials, very thin in size and then you can get a smaller diameter size for the light. Maybe is even better with a low current LED a bit bigger than 402. But if the PCB limits yourself to 402 then something like PICOLED is your best option.

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zumpoofAuthor Commented:
Thank you for such a thorough answer, viki2000.
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