Look at these directions:
It says she uses size 20" addi circulars but also mentions that she is petite. Okay, I am about 5’5" and measuring even my upper arm doesn’t come close to 20"! Is there a trick here, do you think she is using magic loop or something? I was really excited to not have to sew a seam but I think I would rather have the seam than be working with dpn’s on something that long.