In data validation dropdown lists, you can't change the font size. There
are a couple of workarounds he

http://www.contextures.com/xlDataVal08.html#Larger


Big Daddy wrote:
Is there a way to change the font size in the validation drop down list, as
on some spreedsheets it is almost unreadable


--
Debra Dalgleish
Excel FAQ, Tips & Book List
http://www.contextures.com/tiptech.html