Non pixelated print graphics..How?

ok, if i have this pic 20 by 20, then i print it. It looks really badly pixelated, now if it was 40 by 40, is there a way i could keep the resolution but print it out in 20 by 20 size? please help! Im doing the yearbook cover and i want it to look sharp, not so jagged!
Thanks guys (and gals)
shane

Yes, there is a way to make it larger and have the pixels not be as large. It's called changing the properties.. :p Change the properties of the image (I'm sure you have it set to 72) so that the pixels per inch is around 300.. .That should do good for you.

Akuta Same

(P.S. I only replied to this because it was so old, without a response. )