HA! Good luck.
Here is a template to illustrate what is happening.
IMVU's website is the only place your avatar will render true to size.
- IMVU's Website will render your avatar image at
-160 x 220 pixels on your IMVU homepage, site based avatar cards, and the old dead forums
-40 x 55 pixels in Messages
The Client will shrink down your Avatar image but keep its aspect ratio.
- IMVU Client will render your avatar image at
-112 x 154 pixels in client avatar cards
-40 x 55 pixels on Messages history in client
-33 x 43 pixels in friends online
Next takes your Avatar and crops to the top to give a circle. It will keep the aspect ratio but you will loose part of the image.
- Next will render your avatar image at
-50 pixels in diameter in profiles and notifications
-30 pixels in diameter in stream
The 'Discussions' area of IMVU crops AND compresses your avatar. You will keep most of the image (sans the corners; apparently IMVU thinks corners are overrated) but it will distort it to do so.
- Discussions will render your avatar image at
-70 pixels in diameter in Recently Published
-65 pixels in diameter in the category’s sidebar
-30 pixels in diameter in the thread’s posts
-110 pixels in diameter on your My Page
-58 pixels in diameter in your activity/history
I don’t know what is more pathetic, this convoluted system or that I actually wasted my time to document it.