I do not usually shoot people/portriats so this was a bit new to me. Since most of my pics are for the web or get printed 8x10 it easy to crop. I did a family shoot and they are wanting sizes from wallets to 16x20. I guess I'm a little lost when it comes to cropping and keeping aspect ratio. How do I do these pics so they could be printed in multiple sizes? Do I not crop at all and let them decide the print size, or do i crop all them at multiple sizes.