Heatless curls Get Mimi's look with 220g Ombre. Most curling irons will need about 1-5 minutes to heat up before you can use them. Wait no longer, here are 5 Steps to achieve Beautiful bouncy Curls! The unit has a 1-inch barrel for creating perfect curls on all hair types. For tighter curls like the ones on Charlize Theron, opt for the perfect product for my hair.