Hard to tell from the pic but if you can't draw a straight line directly underneath all of the 5 toes, and if the claw marks aren't further from the toes where you can only see just the tip of the claw, then it's a black bear track... and for size analysis, go by what SSS said..
Biggest tracks I've seen. Yeah, i think it's a blackie. I would say 5-5.5" across compared to my boot. I thought it was pretty cool. I found a 300 wby mag shell on the trail with the tracks. I have now named this bear 'Weatherby'.
Good luck!
I would definitely spend some time in the area if you see more sign.
A single set of tracks could mean that bear was just passing through
The width, depth, and cadence of the track says thats a shooter. Bigger boars develop a wobbly swagger when they are walking from the belly swing.
Polar bear, for sure