If you're looking to add some personalization to your LEGO minifigs, there are a few companies that offer decal services. You can usually find a variety of designs to choose from, or you can submit your own design. Decals can be applied to the minifig's head, body, or both. Applying decals is a fairly simple process, but it's always best to follow the instructions that come with the decals.
There are online services that will print custom designs onto adhesive vinyl stickers. These stickers can then be applied to Lego minifigures to give them a unique look.
There are many companies that offer minifig decal services. Some companies are better than others at creating high-quality decals. When choosing a company to create your minifig decals, it is important to consider the quality of the decals, the price, and the customer service.