For how to's on posting pics...CLICK HERE
For a free and small photo program to resize and adjust pics...Fastone Image Viewer/resizer click here
To find the resizer go in to the "edit" dropdown list found on the top bar in the program once downloaded.RED ARROW
To open resizer...Green arrow
Once opened got to green arrow "Pixels"
Change width and hieght to 90 x 90
This will only require one change if "preserve aspect ratio" is checked (black arrow)
Once that is done click on "save" and then click on another pic..
It will ask if you "wish to save changes to photo"...click "yes/save"...maybe rename the photo "avatar" so you will know it.
Your avatar is now ready for uploading.
All other pics I post...examples above... are 600 x 800 which you set in the "Standard" box of the resizer.