Prints available at Artist website (mirrors at Pixels and FineArtAmerica).
Licenses for commercial use - at Shutterstock.com.
9 identical RAW photos was taken as quick series, aligned and averaged for dramatically better signal/noise ratio of this picture. It was captured on large sheet of glass with LED back lighting, using Canon Powershot A650is and additional lens Helios 44M-5, reversely mounted in front of camera's optics, January 2015 in Moscow, Russia.
Here is another small snowflake from this January, which also have unusually complex pattern for it's size - Forget-me-not:
If you want to see more snowflakes, you can browse through all snowflake pictures.
Here you'll find snowflake photo wallpapers in numerous resolutions and screen proportions, up to Ultra HD 4K.
And here is article about snowflake macro photography.