You don't need a 60" or wider grapple to pick up logs. In fact, the heavier the grapple, the less the log you'll be able to lift and carry.
About 7 years ago, I planned to buy a 60" grapple for my ~40hp Kubota; they were out, but they had 48" and 72" (and up). I knew 72" was too big, so I got...