are the units for bloom and glare relative the the system units?

[coolhand78]

or are they universal no matter if you running mm or cm or inches etc..?

[Macker]

The size is a percentage of the image I believe.

[3LP]

Note sure because it doesn't scale up linearly when you upsize your renders, so I don't think it's a percent of the image size, although it could be related.
I'm pretty sure it's not related to the scene units though

Stan