These ornaments are simple hand blown glass balls with a small glass loop on top to hang them up. Our standard Christmas Balls are 3.5” diameter, and are blown thin and light so they can hang delicately on a holiday tree. They can also hang in a window to catch the light, or nest in a bowl for decoration. Outdoor gazing balls are a much larger, heavier version of the Christmas Ball, made with two gathers of molten glass, creating a much more durable piece to hang outside and withstand wind and weather. For a medium size ball that is 4.25″, refer to the Spirit Balls page for additional options.