Linux find command to move files

I have a folder with lots of images,I want to move all images which filename contains "cover" and size is bigger than 100K to /root/img. Below command can move all the files that filename contains "cover" but without size condition.My questions is how to combine with condition that image's size is bigger than 100K.thank you!

find . -name '*cover*' -exec mv '{}' /root/img  \;