From right to left - .75", 1", 1.25", and 1.5" I use 1" the most for looser curls, but I have FINE/thin hair. So if I want curls tighter and to last long, I use .75". This is all Missy's clip in hair. She uses 1.25" the most, but 1.5" for that blow out look. If you're not shopping Amazon, the Nordstrom sale will have one of the sizes for this price, too! We'll post this weekend! Affiliate link LTKBeauty LTKFindsUnder100 LTKSaleAlert