Snowflakes and snow crystals can grow fairly large, but there are

The Guinness World Record folks would have us believe in a 19th century snowflake more than a foot wide, but some scientists are skeptical.

Snowflake Science

High-Resolution Photography of Snowflakes with a Field Microscope, Microscopy Today

Two snowflakes may actually be alike

The snow crystal morphology diagram, showing different types of snow

What Are Snowflakes? Center for Science Education

How Do Snowflakes Form? -- Why is Every Snowflake Different?

Snowflakes and snow crystals can grow fairly large, but there are limits : NPR

The Amazing Life of Snow Flakes – Montana Living

What makes a snowflake special?, News

The Formation of Snow Crystals

Snowflake Science

No snowflakes are the same. These stunning close-up photos are proof. - The Washington Post

Snow Crystals - Jewels of the Heavens — Mountain Safety Collective Australia

What makes a snowflake special?, News