WC environment. Users running WC 10.2 M040 with IE11 and Jave 17 67. We have all other users in our company with all the same configurations without this issue.
It should be a font setting in IE 11. Did you check the text size from Page > Text size.
On a side note, I guess you are on 10.1 M040 and I don't think IE 11 is supported browser for your version of Windchill