Image trace app not to scale?

I am trying to have my students make drawings to scale that will be cut out and used as saw handles. It looks like when i take my scaned PDFs and import them the scale is smaller by around 75% or so. I would like to make this as automated as possible for my middle school kids and do not want to vectorize file or anything like that with inkscape or other wise.

Has anyone ran into this? Is this a file size issue?

using the image trace feature in easel.
The method was Draw to scale ->scan as PDF -> import using image trace in easel