The image elements of the skin, those are called glyphs, right? What I'm wondering is if the size of a particular glyphs or set of them has to be exactly the same size as the original, or if you can make them bigger. For example, I was creating a new set of pushbuttons in Photoshop, so I exported the original which is 13x138 pixels and I created a set of new buttons, respecting the height of 138 but expanding it horizontally. This worked perfectly when I tested it in WSB, but then I wondered if I could make the buttons a little bigger than the standard 21 pixels tall, to I went into image size and change the height to 160, with the width in proportion. I imported that back into WSB and tested it. Even though the graphic file was bigger, when I tested it it had the same height as before. So do every single graphic element I create has to be exactly the same size as the original?
Glyphs are images that indicate something. Like the X on a close button.
You can make them any size you want, however programs usually have the button set to a specific height, so most buttons will look vertically compressed. Just because the image is larger, doesn't mean the actual button will be.
Same goes with every element.