All the pedestals are 10.5cm. high. (That’s an AA battery in the photo.)
The pedestals in the photos were printed on my MakerBot Replicator+ at the default setting of 10% infill and a layer height of 0.2mm. No supports are needed.
Print times varied between 1h. 42m. (Pedestal E) and 2h. 34m. (Pedestal F)
The sculpture on Pedestal A is The New Hobbyist’s scan of a bust of Menander (thing:456219) scaled to fit (175%).
See more of my designs at https://www.thingiverse.com/Winslow/designs.