I think so. Why wouldn't they? Everything else is variable. Big noses, big mouths, big ears, big forehead, big hands, big head, big forearms, big et cetera.
It seems like they vary very little. These differences in size would probably not be perceptible to the human eye.
Dimensions differ among adults by only one or two millimetres, remarkably consistent across different ethnicities. The vertical measure, generally less than the horizontal, is about 24 mm. The transverse size of a human adult eye is approximately 24.2 mm and the sagittal size is  23.7 mm with no significant difference between sexes and age groups. Strong correlation has been found between the transverse diameter and the width of the orbit (r = 0.88).[3] The typical adult eye has an anterior to posterior diameter of 24 millimetres, a volume of six cubic centimetres (0.4 cu. in.),[4] and a mass of 7.5 grams (weight of 0.25 oz.).