I use a 2" barrel.
When my hair was shorter and I wanted to acheive the same look I used a smaller barrel.
I just wrap the hair the regular way, but sometimes when I want a slightly different look I wrap the hair as if I want it to flip outward instead of inward.
I'm so glad I could help! I'm not really a hair person at all and I've been depending on this tutorial (although I dont' need to actually read it anymore, obviously) for years now. I first discovered it in 2002! It's my "foolproof" hairstyle, I always get tons of compliments!