Sewing cases, also known as etuis, are small containers used to store sewing supplies such as needles, thread, and scissors. They are usually made of fabric or leather and come in a variety of shapes and sizes. Etuis are often decorated with embroidery or other decorative elements, making them a popular choice for craftspeople and hobbyists. Sewing cases are an essential tool for anyone who enjoys sewing, providing a convenient way to keep all of their supplies organized and easily accessible.