Size spacers on rear?

[Poodle]

For someone who hasn't used spacers that's something that's just abstract.
Appreciate your attempt at being witty.


If anyone has any pictures, that may also be useful.

Hardly, there's a thing called a tape measure that has these "mm" measurments on it, if you put the end against your wheel you can see all the different measurements at intervals along the length of it, marvelous piece of kit! And, would you believe it, the mm on the tape measure are the same mm that they use to denote sizes on the spacers, what are the chances of that?!