Purchased from Lash Box. Please refer to the official website for detailed specifications. I am selling this as I have no opportunity to use it. Only the M and L sizes have been used once each. I will wash them again before sending and ship them in a simple case and a zip-lock bag. The base is thin and has no curve, so it lifts straight up. It is also recommended for lower lashes. In addition, it has a thin groove that acts as a guide, making it easy to use for those who are not good at curling straight. Although it is a beautiful item, it is still a used item. Please understand that I am not responsible for any issues arising from its use before purchasing.