Unfortunately, Italian sizes are not standard—it is therefore always best to try things on. If you wear a "small," you may be surprised to learn that in Italy, you are a medium. Children's sizes are just as complicated; they are typically based on Italian children's ages. Check labels on all garments, as many are dry clean–only or non–tumble dry. When in doubt about the proper size, ask the shop attendant—most will have an international size chart handy. At open-air markets, where there often isn’t any place to try on garments, you’ll have to take your best guess: if you’re wrong, you may or may not be able to find the vendor the next day to exchange.