Totem encodes the cards so a standing girl can just about touch the top of the screen when she waves her hand above her head. Sometimes they make a mistake and the girl appears larger than she should. This can happen if the girl walks toward the camera.
You can try a simple experiment. One your 1080p screen with a 1080p card set VG to display one card in large size at 90% and set the "never exceed 100%" control in advanced settings to OFF. Now, while that card is playing a standing clip, turn the "never exceed 100%" control ON. The girl will probably appear a bit smaller. You can experiment with the large size setting. For most cards a setting of about 75% shows no change with "never exceed 100%" ON or OFF.
Any time you play a card at a size larger than the nominal size, VG will scale the image up and it will blur a bit. For small increases this isn't noticable. If you played a 3K version of the same card it would look the same up to the 75% size and it would look a bit better than the 1080p version for settings greater than 80%.
On a 1080p screen you can really see this effect by playing a 720p version of the same card and then switching to the 1080p version. The "natural" size of the 720p card will be about 50% of full screen and playing that card at 90% will show noticeable blurring.
I have three displays. The largest is 4K. I've done a fair amount of experimenting. I even stood my 4K display in portrait mode for a while. I could see some bluring of 3K cards played at 95%, but the image was spectacular when the model stood in the center of the stage. However, she would often disappear by walking to the side.
Hope this helps