This thread was very unnecessary, apps requires storage and data, why would you download an app just to resize a single image? and most of the time, avatars aren't really needed especially here in the beginners section 'cause they're not allowed to wear avatars..
It is a good thing to post a guide regarding that but I find it very used already.
If you don't want to download that app due to shortage of memory, then try to browse this links,,,,,
- picresize.com
- resizeimage.net
- resizeyourimage.com
It ll make you easier and more convenient than installing an app that has a lot of adds popping out of nowhere. You just need a default browser 'cause all of smart phones have default browser and just go the links I listed. ,,
If you're a samsung user, there's an installed app from samsung which is photo editor that allows you to edit the picture and resize it.
For some PC users, I think this is unnecessary also.
You'll just need paint tool and resize the actual pic.,,,