I would like to be able to select a layer, and see the width/height of the selected layer in Photoshop CS5. I'm sure there's an easy way to do this, but for the life of me, I can't find it. I've tried putting it into transform mode, but it just shows 100% to let me adjust it percentagewise.
If you Ctrl-click (Cmd-click in OS X) a layer in the Layers window, it will select the visible pixels in this layer.
Then, check your Information (INFO) window. As always, the width and height of the current selection will be displayed.