1. Choose a picture.
2. You need a belt with a flat buckle. I had a little deep surface so first of all you have to fix it. You can put some layers of paper by simple glue. Check the buckle size (mm x mm) and add this size to your image and print on an adhesive paper.
3. Cut out and stick it.
4. Important part! You have to cover the image by a plastic foil to save it from dirt and water what you get when you wear something. In a paper shop you can buy a simple transparent adhesive foil glossy or matte. I chose matte. When you cut leave it bigger to have a safety area because when you stick it also to the sides of the buckle the water can't reach the image easily.
5. Its done!