No- you are not seeing things. Despite the name, these are actually Hexagonal in shape, but are considered part of the Octagon line.
The height for the green tumbler is 5 & 3/8", while the height for the rose tumbler is 5 & 1/2". The top, for both, is 3 & 5/8". flat-to-flat, and 3 & 3/4" point-to-point. The base diameter for both tumblers is 2 & 15/16".
