Changing the size of the App + Key's text?

Hi I need some help chainging the font size of this text - http://monosnap.com/image/Vchs6DPYDaunAbuSJUoF2Sf0J96K3a

I though this might work

}
.td {
font-size 10
}
}

But seemed to do nothing so i guess i still have alot to learn.

anyways This is the page - http://tinyurl.com/pk7kh8x

Support Access is open until the 14th

Thanks
Tom