If you select Orig, the original size of the uploaded image displays.
Select this option you upload a photo in the size you want it to display

If you select Fit, the image sizes to fit the region.
Select this option if you upload a photo that is too large for the region.

Also, images may appear distorted when viewing pushpage issues through the Gmail Mobile App. We are unable to make adjustments to prevent this, and the following link has more information about this:
https://litmus.com/community/discussions/43-gmail-app-images-not-resizing