This glass display dome measures EXTERIOR SIZE: 5.5" wide by 10" high (+/- .1") INTERIOR SIZE: 5.5" wide by 9.75" high (+/- .1") This dome begins to arch at approximately 7.25". Base is approximately 6.675" in diameter and .5" thick. Available with your choice of base. Perfect for the discriminating collector! Add a lazy susan that can be glued to your base for added display dimension. Select desired base type below: