The majority of sewing machine needles will work in all sewing machines. Schmetz needles, for example, are compatible with all sewing machine manufacturers. Sergers or overlock machines, embroidery machines, and other specialist equipment, on the other hand, may employ different sorts of needles. It is important to note that some sewing machine brands are more popular than others, so their products will most likely be available from sewing supply stores. If you want to use your old sewing machine needle on a new one, you only need to know its size. The diameter of the needle hole affects how you thread it-the thinner the wire, the smaller the hole needs to be. Most sewing machine needles are made out of steel or titanium, with stainless steel being the most common material. They usually have a length of between 30 and 40 inches and a sharp point. The head of the needle is the part that goes into the fabric; it has several holes for threads to pass through. Needle sizes vary depending on whether you are using a hand, foot, or electric machine. For general sewing purposes, any size needle will do. If you are making clothes for small children, however, you should use a fine-pointed (24-30) sewing needle. This will help prevent tears in the fabrics due to excessive pressure. For best results, choose a brand name needle that is identical to the one in your old machine.