Using these Celtic Rectangle Decals is easy. First, clean the surface where you want to apply the decal to make sure it's free of dirt and grease. Then, carefully peel the decal from its backing and place it on the surface. Smooth it out gently to remove any air bubbles. When it comes to sizing, measure the area you plan to decorate and choose the appropriate size from our wide range. For colors, pick the one that best suits your style. Keep in mind that the decals should be applied in a dry environment. To maintain the decals, avoid using abrasive cleaners. Instead, use a soft cloth and mild soap to clean them. This will help keep the colors vibrant and the decals looking great for a long time.