Note: The individual squares don’t line up perfectly so some of the heights look off unless you look at those characters on the line itself.
Disclaimer: THE NUMBERS ARE NOT CANON. I arbitrarily set Alm at 170cm based on Average Anime Protag. The rest of the heights were calculated from that. You could set Alm (or another character) at any other number and scale the rest of the cast accordingly.

A huge thanks to Kantopia and kushmario @ Twitter for providing scans!

At the bottom of the staff page in the Valentia Accordion is a lineup of all the characters that appear in-game. However, the line is split up and the characters are arranged by group rather than height. Using level, unbound scans provided by Kantopia, I stitched together both pages here, set down a line, and then measured and scaled each character. I managed to get relatively precise measurements, so for added fun, I decided to set Alm’s height to 170cm and calculate the height of all the other characters based on that. They turned out pretty realistic!

For a larger version of the full line, check it out here.