1-up-
Here you go:
Measuring from base of shaft straight up to the height of the highest point - 6 13/16 inch
Measuring from base of shaft diagonally to hightest point - 7 3/16 inches
Hole in bottom of base accepts 3/4 inch shaft.
Happ recently started selling this and their other analog sticks with the base shown in your pic- but they used to come with the big spring assembly on the bottom, like mine. The base of the stick, from the top of the mounting plate to the bottom of the mounting bolts (that's the base only, without the big spring assembly) measures 3 inches.
Add in the big spring assembly and it goes 5 inches.
I dunno what other measurements you might need, but feel free to ask for more!
I couldn't get the base and the handle in the one pic, because the control panel they're mounted in blocks the view. And yes, that's a 2nd stick in the background, the panel is from "Cybersled", a tank game.