how to resize an iframe

I have an iframe on an aspx page with a poll inside of it. Somebody told me
I should reduce the size of the iframe (make it skinnier) by just a small
tad. I do know the poll inside the iframe is 125px wide and 400px tall. Can
somebody take a look at the running page and let me know about how many px
smaller on each side I should make it and how I should do this? You can find
the poll at www.eternityrecords.org.