There are 5 blades and 5 external gears (they are the same size). The hole diameter is 23mm; the external diameter is 64mm; Height is 7.7 mm.
Suggest printing the parts with resin material. After 3d printing the 3d models, you need to use M3 screws and diameter 1 mm pins (length 4mm) to assemble parts together. Due to the 3d printing accuracy, maybe you need to file some parts a bit before assembly.
There are two ways to open/close the blades-rotate the ring gear or rotate the driving gear with a tool.
Free 3d pdf file: https://www.tanerxun.com/mechanical-iris-shutter-mechanism/.html