Show image dimensions in status bar in Windows 8 File Explorer

You can add the "Dimensions" column to explorer to get those details, once you add the columns you want, save the folder properies to make it add "Dimensions" to all folders like the one you have open.

I also searched around a little bit about that topic because it was a quite useful feature.

Unfortunately, the only way I found to get those details is by enabling the details pane (in explorer --> view --> click on details pane).

However, this view is panned on the right side of the explorer ((I did not manage to move it) and uses much more space than the old one in status bar. It's quite annoying, but you can quickly enable/disable this pane if you right-click on the details pane toggle --> add to tool bar for quick access (or something like that, I do not have the English version). Then the toggle shows up at the top window border.

Hope this helps you a little bit.

I used this feature a lot in Windows 7 as well and missed it upon switching to Windows 8. The "Content" view shows both the thumbnail and image size in the same view which is most helpful to me since image names aren't always descriptive.