Each piece is 2cm wide! We often deliver them at 4cm, so please cut them in half to 2cm and apply. [52cm - Black, Highlight Brown] ※ Level scale: 9 tones. Merit Hair: These are our original seal extensions, a perfect blend of the highest quality Japanese-made artificial hair and the finest human hair. Although it's Merit Hair, you can use curling irons and flat irons without any problems. The quality is very close to human hair, so please rest assured. Over 90% of Remy hair on the market is hybrid. The quality of Remy and hybrid hair is exactly the same, making it impossible to distinguish even for professionals, but please be careful not to be deceived. Also, please note that the quality of artificial hair can vary greatly, especially with Chinese-made artificial hair. We receive many opinions that the color is different from the photos, or that it appears lighter or darker than the photos. Due to the nature of seal extensions, the appearance varies depending on the time of day, the way light hits them, 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 are buying impulsively during the high season.) Especially, there are people who try to threaten us with the reason that the color is different from what they expected after changing the number of extensions, but please confirm that you are responsible for your own purchase.