A question about "Treatise on Invertebrate Paleontology"

[mbarco]

Since I have a pdf copy, how can I understand the real specimens dimensions if it's not used a scale bar but a "paper ratio" (see attached picture) for every fossil picture? I don't know the real picture size.

Thanks a lot!

[TqB]

I've just measured my few (7) Treatise volumes and there is some slight variation in page height:  245 ± 2mm, so 245mm should be accurate enough.

[mbarco]

Thanks a lot!

[Doctor Mud]

It’s annoying to see when this method for providing scale is used. I suppose it worked ok when in print form and saved adding a bunch of scale bars to a figure. 
but I’m a digital age when sometimes you are looking on a phone, tablet or laptop, not so good anymore! 

[erose]

You are going to get "approximate" at best.