I WONDER - Are All Snowflakes The Same?

The video explains that while snowflakes may appear identical, they are unique under a microscope. Snowflakes form in cold weather when droplets freeze onto dust particles. Typically, they have six sides and are made of about 200 tiny frozen crystals. Their shape and design depend on their fall speed and direction. The largest recorded snowflake was 15 inches wide, comparable to a bowling pin.

What factors influence the formation of snowflakes?

What is the approximate size of the largest snowflake recorded?