I have a slider on each subpage and I want them each

I have a slider on each subpage and I want them each to be the exact same size. However the only option there appears to be for re-sizing is dragging and dropping it, and trying to maneuver the edges around manually with the mouse. Not only is this hard to do, its very inaccurate. So I have 7 pages with 7 sliders that are all slightly different sizes and in slightly different places.

How can I specify EXACTLY how big, down to the pixel, each slider is, and where precisely it appears on the page?

Thank you.