How can I sort my photos by size? I need to get rid of those which are too small to print.

Is there a way to sort individual photos in iphoto by size. (I know you can sort photos in finder- picture by size, but mine are in iphoto). I am organizing my thousands of photos into files within iphoto in order to print hundreds. I am finding that many are too small to ever print (20-30kb) , and would like to delete those en masse rather than waste time sorting them, but cannot find a way to do that. Does anyone know if there is a way? It would be a terribly useful function. Also, sorting by size would enable you to resize photos that take massage amounts of room unneccesarily. Thanks for any info.