Frame Height and Width?

Is there a way to specify the Height and Width of a Frame (in Master Page Editor)?

There are fields for those attributes in the Properties Panel, but they’re non-functional. It’s taxing my maths to work out whether two frames are exactly the same size, based on their positional co-ordinates.

Those attributes are functional if you turn off one or two of the padlocks in the top left corner. Either you lock to one side of the frame and define the width from there, or you lock to both left and right and the width is dependent on how wide the page is. Same goes for top and bottom.

Doh. Of course. Thanks.