IrfanView is d easiest to use
just measure d dimensions of 1 passport size photo and den enter it in d value in
Resize/Resample image window (Ctrl+R) and u will have a passport size pic ready 2 b printed
actually 2 get d best result u must custom-crop it 2 get an image that matches d aspect ratio of d passport id
den u shud go 4 resizing, else u will get a streached/shrunk image
best of all it is a
FREEWARE