When box-sizing: border-box; is use for images (boostrap use for example), the width and height displayed in width/height ribbon inputs are 2px smaller than the real width/height of the image.

As result, resizing the image by changing inputs or using arrows does not work correctly.

For examples:

• select a image and enter "400" for the width => the image is resized but input displayed 398px instead of 400
• select an image of 398px and clic on up arrow to increase the size of 1px => the image is resize to 399px but the input width value is 397px => the image is resize to 397px