I've got a 1080p monitor and a 1440p monitor with a composite image centered inside of the indicator. I've noticed that the pixel value doesn't match the indicator diameter. The image is set to 190px while the indicator radii is set to 60px (so 130px diameter including the thickness).

1440p

1080p

If it would scale correctly the image size would be smaller on my 1440p monitor while bigger on the 1080p display