Each piece is 2cm wide! We often deliver them at 4cm, so please cut them to 2cm and apply. [52cm, Original Color Silver Ash] Merit Hair: This is a unique seal extension that blends the highest quality Japanese-made artificial hair and the finest human hair in an exquisite ratio. Although it's Merit Hair, You can use curling irons and flat irons, and It's very close in quality to human hair, so Please rest assured. More than 90% of Remy hair on the market is hybrid. The quality of Remy and hybrid hair is exactly the same, so even professionals can't tell the difference, but please be careful not to be deceived. Even with artificial hair, the quality can be quite poor if it's made in China. Please be aware of that as well. We receive many opinions that the color is different from the photo, or that it's lighter or darker than the photo. Due to the nature of seal extensions, The appearance changes depending on the time of day, the way the light hits it, and the lighting. There are also individual differences in quality, so please purchase at your own risk. Occasionally, buyers demand unreasonable returns, but we will not accommodate them. (Please be especially careful if you buy during the high season.) Especially, there are people who try to intimidate us by changing the number of extensions and claiming the color is different from what they expected, but please confirm that you are responsible for your purchase.