Sizing
30mm, 50mm, 70mm, and 100mm Robot Eye Size Guide
A buyer-focused guide to choosing robot eye diameter by face opening, viewing distance, camera clearance, and sculpture scale.
Start with the visible eye opening
The listed eye diameter is the physical eyeball size, not only the visible iris. Measure the opening in the face shell, the clearance behind the eyelids, and the depth behind the eye before selecting 30mm, 37mm, 50mm, 70mm, or 100mm. A smaller visible opening can still use a larger eyeball if the rear cavity has enough room.
30mm and 37mm eyes for compact heads
30mm and 37mm eyes are usually best for small robot heads, AI toys, BJD dolls, figures, masks, and compact props. They look natural at close viewing distance and leave more room for brackets, wires, and face-shell thickness.
50mm eyes for robot heads and camera-ready tests
50mm is a practical middle size for humanoid robot heads, desktop animatronics, prop heads, and camera-ready eye experiments. The larger body gives more space for a rear cavity, an OV5640-style module, and a cable path while still fitting many head shells.
70mm and 100mm eyes for large sculpture work
70mm and 100mm eyes are meant for display heads, dragon heads, monster sculptures, installations, and large props viewed from farther away. At these sizes, the iris detail becomes a visible design feature and the rear structure should be planned before the shell is printed or sculpted.
Double-check the final diameter before ordering
Handmade eyes are built to the selected diameter, so the best workflow is to measure the face opening, confirm the desired visible iris size, and check rear clearance one more time before adding the eye to cart or submitting a custom quote.
FAQ
What is the best robot eye size for a small desktop robot?
30mm or 37mm is usually the best starting point for a small desktop robot because these sizes leave more room for eyelids, brackets, wires, and compact motion structures.
When should I choose a 50mm robot eye?
Choose 50mm when the head has enough rear depth and you want a stronger visual presence or a camera-ready build with more space for an OV5640-style module.