Below is a link to a site that some members use to re-size their photos....http://studio.webbyland.com/MagickSt...gickStudio.cgi
Just browse your computer for the picture you wish to resize, then click "view". Your picture will appear with a row across the top of options. Click "Resize". Here, you are able to either enter the exact dimensions you'd like or else choose from one of the options provided.
The size limit for photos is usually 400 x600 pixels.
To re-size photos already posted just click the edit button at the bottom of your post and go from there.
I am sure other members will have some additional ideas for you.