If you don't have one control that has the correct width and height, the ribbon options might be somewhat limiting. If you have specific dimensions or left/top placements in mind, in design view select all the controls you wish to apply the value to and enter it into the property sheet for that property. It will be applied to all the selected controls. You could also resize an entire group in layout view if the controls you wish to affect are part of any groups.
The more we hear silence, the more we begin to think about our value in this universe.
Paraphrase of Professor Brian Cox.