Now back in yonder years not too long ago, photographers would take your picture, in hopes of selling it to you or yours (such as student pictures at school), ….. and they would then print one (1) large copy [4X6, 8X10] for you ……. and to entice you to purchase your picture they would also print an 8X10 sheet of small copies [1X2, 2X3] for you to cut apart and give to relatives , friends, etc.
Those small pictures were the ones that were used when composing "school yearbooks"