How to change size of datepicker - in conflict with existing style sheet

How to change size of datepicker - in conflict with existing style sheet

G'day,

Just a quick question.
I have my own style sheet for my page. And because of the conflicts between my style sheet and the one provided through the theme in the jQuery UI, the date-picker is aprox. double in size as to what it should be.

As i understand it, the main jQuery style sheet sets its font size as 62.5%. How can i change JUST the size of the date picker???

thx