to smooth Power Steering

THX alot for everybody`s help .
In the "Pump it Down ... Easy " Post are a pic with the other washer where came in
with 0.0825 .
My metric translater have problems with this diameter , so could someone tell me
how much metric mm (millimeters) this be ?
In Europe a nomal standart washer have 5 mm ( 0,5 cm ) .
Copper sealing washers are thinner .