Size 10 crochet thread
1.5mm crochet hook
The original pattern, and many more snowflake patterns, can be found here at Snowcatcher. This wonderfully talented women is passionate about raising money for MS. If you like this pattern please, please go visit her site and consider making a donation.
Snowcatcher writes: If you enjoy my patterns, please consider making a tax-deductible contribution to the Colorado Chapter of the National Multiple Sclerosis Association. I'll be riding the MS-150 in June to show my support for eight relatives, friends and relatives of friends who battle the disease every day.