To use this set, simply wear the shirt and display the medals. When wearing the shirt, make sure to choose the right size for a comfortable fit. For the XL size, it should fit well with a length of about 29 inches and a chest measurement of 22 inches. The XS is great for kids. When it comes to maintenance, machine - wash the shirt in cold water and tumble dry on low. Keep the medals away from harsh chemicals to prevent damage. Also, note that the price already includes shipping within the USA.