modify dropdown list width

I put a list on the form and have it link to dynamic recordset.

I want to modify the width and height to smaller, but it seems that it does not change when I modify the value of the control.

I can easily to modify width and height for text box, but it does not work for dropdown list.

What property I can change to modify the width and height of the dropdown list?

Your help and information is great appreciated,

Regards,

Iccsi,