The skulls of 20 New Zealand albino rabbits, killed at 188–302 days, were used to compare linear and volumetric orbital measurements. On the right side an evisceration or enucleation was done at 7–21 days of age. The left side was unoperated. Both volumetric and linear measurements of the orbit were less after evisceration or enucletation. Lateromedial (depth) measurements on both the operated and unoperated sides and anteroposterior measurements on the operated side correlated quite well with observed imprint volumes. Anteroposterior measurements on the unoperated side and superoinferior measurements on both sides did not correlate significantly with observed imprint volume. The irregular shape and openings of the rim and walls of the rabbit orbit are problems in accurately evaluating orbital size.