Each piece is 2cm wide! We often deliver them at 4cm, so please cut them in half to 2cm and apply. [52cm, Highlight Brown] ※ Level scale: 9 tones. Merit Hair: This is our original seal extension, a perfect blend of the highest quality Japanese-made artificial hair and the finest human hair. Regarding Merit Hair: You can use curling irons and flat irons without any problem. 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, making it impossible to distinguish even for professionals, so please be careful not to be deceived. Please also note that some Chinese-made artificial hair can be of significantly lower quality. 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.) In particular, some people 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 purchasing at your own risk.