Saw these online for sale at an extortionate rate so thought I'd design and print my own.

Obviously they are printed so tolerance wise they are per 3D printing. I measured each dimension with a caliper and the following were the results:

0.25mm - 0.3mm          0.5mm - 0.57mm          0.75mm - 0.75mm          1.0mm - 1.04mm          1.25mm - 1.32mm          1.5mm - 1.56mm          1.75mm - 1.8mm          2.0mm - 2.02mm            2.25mm - 2.25mm         2.5mm - 2.53mm          2.75mm - 2.73mm        3.0mm - 3.01mm          3.25mm - 3.28mm          3.5mm - 3.5mm             3.75mm - 3.75mm          4.0mm - 4.02mm          4.25mm - 4.27mm        4.5mm - 4.55mm            4.75mm - 4.75mm         5mm - 5.02mm          5.25mm - 5.3mm          5.5mm - 5.54mm          5.75mm - 5.78mm          6mm - 6.03mm              6.25mm - 6.26mm          6.5mm - 6.54mm          6.75mm - 6.73mm        7mm - 7.04mm               7.25mm - 7.29mm         7.5mm - 7.55mm          7.75mm - 7.77mm        8mm - 8.02mm