The largest snowflake ever observed was reportedly 15 inches wide and 8 inches thick.

This is the record-holder for largest snowflake, which was reportedly "larger than milk pans". It was found in Ft. Keough, Montana in 1887.

In reality, though, the largest snowflake ever seen could never be known because there have never been official measurements taken of one.

This and more answers to snow and ice questions on this USA Today feature.