The Iris (color part of eye) is made of hard plastic set in white acrylic. These Eyes have Flat Backs and are sold in PAIRS.
The Size of the Eye is measured by the IRIS (color part of the eye) and Overall Dimensions are provided in the description.
Select the size of Iris then scroll down the page to view quantity discounts and color selection box.
6mm = (approximately 1/4 inch or 0.236 inch)
12mm = (approximately 1/2 inch or 0.472 inch)
25.4mm = ( 1 inch )
Adult Human Iris (color part of eye) size ranges - 11mm to 14mm