There is no need to re-size your desired avatar if you use the "Link-off-site" feature. After attaching the URL link in the "Link-off-site", you just simply force the size to 128 by 128 and the system will automatically re-size it for you. That is, please enter '128' into the dimension boxes.
Hope this helps.
Please be forewarned that you are reading a post by an otiose housewife. ****@@