Again, there's really nothing in that picture to give it any indication of scale whatsoever. Those trees look big, and make the cat look big by comparison, but it's an optical illusion. The only thing you can compare in the pic is overall body length relative to leg length. But there's nothing there of known size that you can relate the size of the cat to. In pics like these even the height of the camera relative to the ground can cause illusions like this. Lower to ground, bigger the animal looks. It also looks like this trail cam may be pointed uphill, which would exaggerate the effect. I still say bobcat and I'd be willing to bet it really isn't an unusually big specimen either.