Prints from InDesign come out less than 100% size

Recent prints made from InDesign come out slightly smaller (i.e.7 1/2 X 10 inch image in InDesign  prints approx 1/16 inch smaller all around; 12 X 18 almost 1/4 inch smaller). I've never had this happen before. I checked all the print settings dialogues in InDesign as well as for my printer (Epson XP 15000) and they all say print at 100%. I can't find any settings anywhere that say to reduce size, and paper is not set for borderless. I tried printing a document from Pages, and it came out at the exact size, so it seems to be just happening with InDesign. I have a 2019 iMac 27" running Mojave, and all the printer and InDesign software updates are current.