You can use it with a cover on a badge of about 55mm (◍•ᴗ•◍) Front: There is a ribbon to attach a safety pin, so you can use it without making a hole in the rosette itself. A magnet is placed inside the felt, so the badge will be stable when attached. Back: There is a ribbon to attach a safety pin or ball chain, so we recommend using it together to prevent it from falling. The main body is made with double-sided tape for temporary fixing and fabric glue. The parts are attached with a glue gun. Please be careful when handling it, as it may be damaged if excessive force is applied. If a part comes off, please reattach it with adhesive or a glue gun. The color of the actual product may differ from the photos depending on the shooting environment and the device. There may be glue overflow. Please purchase with the understanding that this is a handmade item (*ᴗ͈ˬᴗ͈)”