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,
Zumpoof
zumpoofAsked:
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viki2000Commented:
I think yes. It is the smallest one that you can buy.
it is called PICOLED-RGB:
http://www.rohm.com/web/eu/news-detail?news-title=ultra-compact-1006-size-0402in-picoled%E2%84%A2-series&defaultGroupId=false
http://rohmfs.rohm.com/en/products/databook/datasheet/opto/led/chip_multi/smlp34.pdf 
which is actually 1mmx1mm named SMD 404
http://eu.mouser.com/ProductDetail/Lumex/SML-LX0404SIUPGUSB/?qs=iPumNTI%2f3jXoZkWlWVrBPw%3d%3d
http://www.mouser.com/ds/2/244/SML-LX0404SIUPGUSB-202559.pdf
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:
https://en.wikipedia.org/wiki/Surface-mount_technology
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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