Hey Passthrough,
bears are the hardest animal to judge, need something to compare them to for size, at a bait you look at the barrel but at a pile of bait there's nothing unless you mark the tree or put a 4 foot peg in the ground?? the first and 3rd pic look like decent bears, head size is also tough, good rule of thumb is, if ears look too small, bears good, it ears look big and floppy, hasn't grown into them yet