Abstract: Methods and devices for ring sizing are described, including a ring sizing device that may be affixed to a platform, that allows users to evaluate ring sizes. The ring sizing device may include a stationary panel and a movable panel, where the stationary panel may include a bottom portion configured to be affixed to a mounting platform and a top portion having a top edge with one or more semicircular-shaped notches. The movable panel may be coupled with the stationary panel and configured to move relative to the stationary panel. The bottom edge of the movable panel also may include one or more semicircular-shaped notches and the combination of the panels may form one or more ring sizing holes that have an associated first height when the movable panel is in the first position and a larger second height when the movable panel is in the second position.