Scale model so distance between highest and lowest vertices are equal I have a bunch of models I made previously, and exported to obj's, all different sizes, I lose the original blend files to ransomware, but need to import those obj's into blender, and make them all the same size (ie, the distance between the topmost vertex and lowest must be equal for all the models, how can I set them all to, say, one unit?

Any help appreciated.
I would recommend using a script, see this answer https://blender.stackexchange.com/a/156501/15543

import bpy
for ob in bpy.context.selected_objects:
    if ob.dimensions.z:
        ob.dimensions *= 1 / ob.dimensions.z


will set all selected  with z dimension, to z dimension 1.

Note this is making the vertical (z direction) distance between top and bottom verts equal, and doesn't take into account x or y location at all.


  is there a way to do this without scripting?


Equiv of this per individual object in the UI