Dimensions as criteria for iPhoto smart album?
Answering my own question. Here's how you do it:



You need to set it a condition for [size][space][unicode ×][space][size 2], for example: 320 × 480. Not straightforward, but it works. However, it doesn't actually care which order you put the width and height, so this one will find 320x480 images as well as 480x320 images.