HERE. There are 3 sizes and I use the middle size.
Another tool I use all the time is a porcupine quill! It is super strong and very sharp on one end and is cut at an angle at the other end as you can see in the photo. The angled end is perfect for paper piecing. You can just run that end along the stitched seams and the paper just comes right off. The sharp end is perfect for guiding things through the machine presser foot. I can tell you for sure that I would hate to have a bunch of these embedded in my skin! I got mine at a quilt show a long, long time ago. I found someone on Etsy that does jewelry from these quills so I wrote them to see if I could buy some from them but they never responded. My point is that, if you have a chance to buy one, grab it! You will thank me!
Then I had to share this with you. I found this on Pinterest: