White curling iron with digital temperature display. I don't know the barrel size (mm). I used it a few times, but I couldn't use it well, so I put it away. As you can see in the 8th photo, there are a few scratches. The box and instruction manual are not included. Therefore, I will ship it in this way. It heats up quickly when you turn on the power. The temperature can be adjusted from 1 to 10. Thank you for viewing. Please refrain from purchasing if you are sensitive to imperfections.