Medium size snowflake, 4-5 mm. 11 serial shots averaged to boost signal-to-noise ratio. Background: dark woolen fabric, natural light (clouded sky), external optics Helios 44M-5, march 2013, Moscow. Looks better in original resolution: 1703 x 1277 pixels.
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.