Both of these snowflakes were crocheted using the same pattern.
The snowflake on the left was made using Peaches and Creme worsted weight cotton yarn. The finished snowflake measures 7 1/2 inches. This size might be nice to use for embellishing a large project such as a sweatshirt or roomy tote bag, although it is quite thick; you may wish to use a finer yarn, depending on your project.
The snowflake on the right was made using size 3 crochet thread. The finished snowflake measures 4 1/4 inches.
I used the smaller snowflake to embellish a crocheted potholder.