Not really long at all...in my experience. You know you can make different sizes by using different size thread and hooks...or even yarn and the bigger hooks...especially if you want to practice on a new pattern. Just match the hook size to the yarn/thread size.
Since I use tiny hooks all the time, thread is my passion, going to the larger hooks is very hard for me, and I find I am quite clumsy for a long time trying to do something with yarn, but I manage. As stated in earlier posting, if you want to try a snowflake pattern in yarn, or any pattern you are unfamiliar with, I also do lots of angels, I make a few rounds/rows with yarn, get the pattern established in my head, and go for it. Good luck in your project, you will enjoy the results I am very sure.