How do you change the resolution size of a picture?

I need to save a picture from the web and make it bigger to upload onto a t-shirt printing website.



I figured that there were a lot of people in this group, so that's why's it's in singles and datingHow do you change the resolution size of a picture?
www.imageshack.us ;]]How do you change the resolution size of a picture?
You can try IrfanView...it gets the job done and its free.
haha, you really need to ask thins i Computer section(there are also billion of people in there, I ';hang out'; there all the time)

But here is the answer.

you can not make a picture bigger then it is, because it won't look good.