Saving CorelDRAW as PDF changes size/dimension?

I normally work in inDesign, Illustrator and Photoshop - and someone's sent me their artwork for a record sleeve as a PDF which they created in CorelDRAW and save as an EPS.

However, despite insisting that size instructions for followed to the millimetre, the resulting files are a bit too small but also not deep enough in relation to the width. 

They have no idea what the problem is and it's down to me to figure out the problem for them. Does anyone have any ideas of what's going on or what I could have them do differently to fix the problem?

Thanks.