Achievement image default dimensions

I checked  Recommended Image Dimensions  which has some helpful general guidelines but these images were not specifically addressed. I checked the images supplied with the platform and they are 64x64, so I'll be updating Recommended Image Dimensions.  I see that Article Category Icons are the same size, and it also states that pixel-independent SVGs are recommended instead of rendered images.

Tom Paolucci said:

I checked the images supplied with the platform and they are 64x64

The achievement images are resized depending on where you view them.

Looking at:

Administration -> Membership -> Achievements at the default Verint achievements, the images uploaded are 100x100

An example is "A Way with Words I" which uses the following image:

1323.A_Way_With_Words_I.png-100x100.png

Are these images being upscaled on the preview in the Achievements administration panel from 64x64, or is 100x100 the original image size?

Thank You Christopher G. Stanton (cstanton), I stand corrected, the image is 100x100. When viewing the list of achievements the images are 64x64, but when viewing the edit achievement page the image is 100x100. It also resizes to 88x88 in a circle when looking at the page that displays the recipients. 

Thank you for confirming Tom Paolucci , it's been difficult to determine this! :D

Thank you for confirming Tom Paolucci , it's been difficult to determine this! :D