Size 1 are the ones that are about 1 inch long. Size 2 are about 1 3/4 inch long, and those are the ones I use most of the time. I have used the Size 1 at times but find that the size 2 is much easier to use with my arthritis getting worse. But, as mentioned before get you a Kwik Klip. It's well worth the investment. Saves the fingers from getting poked and sore. It's just a few dollars when you use a coupon at Joann's.