A 9mm barrel, which is narrow. That matters: the thinner the barrel, the tighter the curl, and 9mm gives you the defined ringlet rather than the loose beachy wave. The LCD shows the real temperature and lets you set it anywhere from 80C to 230C, so fine hair can stay low and thick hair can go higher. Tourmaline ceramic heats evenly, and the cord swivels a full turn so it does not wrap itself around your arm. HOW TO USE IT Dry hair, small sections. Wrap away from your face, hold for a few seconds, release into your hand and let it cool before you touch it. Start at the lowest heat that works. IN THE BOX Curling wand with 2m swivel cord. DELIVERY Typically with you within 9 days. 14 days to change your mind.