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I've done a lot of testing with measuring height in kisekae. Using the default k-on characters as a base (since they have known official heights), I determined the most accurate setting for that height chart image to actually be size 84, elevation 597, with your characters positioned at depth 500 and leg position 16.
Dunno where anyone got that the chart should be set to size 65, at that size Yui who's 5'1 is measured 6'4.