A set of 100 sewing threads for sale! They are colorful and come in various colors! I received these as a gift, so I don't know the details, but I believe they are sewing threads. The material is unknown. How about using them for handmade crafts? The spools are about 2.5 cm high and 1.5 cm wide, smaller than standard sewing threads. I'm not sure if they are unused or used, but please check the photos for details.