With pieces or writing, photographs or artwork, copyrights are easy. You simply watermark your name over the top or write it into the file itself and the piece is considered to be your intellectual property. With clothing though, copyright is done a little differently: clothing labels. If you own a small shop and design your own cloths for it, make sure you have a good logo and a reliable clothing label to attach to your garments so that other people can’t legally claim the garments and your designs as theirs.
Clothing labels can still be simple, with either your name or your shop name and an optional logo, but the small amount of information you attach is important for claiming the design as intellectually yours. When you put so much time and effort into your work, you don’t want to see someone else claim it, so make sure you do what is necessary to legally protect it as your own idea.