These curlers are the 8cm length and 8mm diameter. You can scale the model as you wish.
Watch the video on youtube: https://youtu.be/qbUrstC_CB4
This item is a fully 3D printable file (set of files) that will be sent you as a link for downloading after purchasing. If you don't have an access to 3D printer or don't want to use 3D printing services, you can buy Realistic Doll Eyes here (10mm) or here (12mm)!