It realla depends, some celebs have their own photos to send, some don't. The best thing you can do is search the feedback section to see what celebs don't send theire photos. As for the quality, a picture for printing a good quality 4x6 photo should have at least 400x600 pixels. The bigger a picture is, the better photo comes out.

A good tip for finding the right photos to use online, is to find big photos. Usually, the bigger the image is, the nicer it'll look when printed out as you're not stretching the image

I usually send a photo with my letter just in case the artist doesnt have their own photos. You can find some high quality photos online.

I was just wondering, do you really need to send a photo with your request letter?

and if you do, once you find a photo online, how do you know if it's going to print good as a 5x7 or an 8x10?

thanks so Much!