Most jewelers and jewelry stores offer resizing as one of their services. If a ring was purchased at a specific store or location, resizing may be included in the warranty offered with the ring.
Resizing a ring is a relatively common service offered by most professional jewelers. However, the process can weaken the ring's band if done to excess. It is best to purchase a ring as close to the right size as possible and resize it only once. This is because the process requires that either the metal itself be cut away or stretched in order to achieve the desired size, which greatly reduces its durability.