Why isn't this included in the specifications.
Ex - 1.30 is very different from 1.25
We have:
Weight
Balance point
Shaft diameter
Shaft taper
Ferrule length
Ferrule material
Joint
Wrap
Tip
..........
I feel butt diameter should be a top 5 spec to list.
Many of those are not automatically included in any description.
There are no real standards in cues, just things that are considered to be 'common' but anything and everything can and do vary between your list to everything thats left. Ferrule installation (maybe most important to ferrule play) , shaft and butt lengths, joint OD, butt tapers, wrap lengths, joint and but cap lengths, bumper configurations and so on and so on.
Until there is an industry 'standard' set for any one part of the cue , if you want to know, you have to ask.
Oh and you better ask how they measured it too.