Would anyone be able to assist me in reducing some file sizes without making the pictures so tiny you can't see them.

I cleaned and polished my new car last weekend and took some pictures to upload them to the site and forgot to change the quality from 6MP to something smaller like 2 or 3MP.

I managed to use a photo editing program to get them down 1048 x 1056 pixels which reduced the filesize to 350K but I can't do anything better and of course the car is all filthy now so I can't take more pictures until I get a decent weather day to take more.

Any suggestions?