Ah, but a man's reach should exceed his grasp,
Or what's a heaven for?

Robert Browning (1812–1889)
Andrea Del Sarto

Leonardo's famous drawing of a man within a circle within a square is meant to illustrate that the arm-span of a man is of a measure equal to his height (not exactly true, but close enough for poetry). Mnemonics like this were once common learning tools for draughtsman.

Weasel, of course, has little teeny-tiny forelegs, like a tyrannosaurus. And so her grasp greatly exceeds her reach. When taking down an animal bigger than herself, she clutches it tightly to her breast and rakes her strong back legs across its abdomen, ripping its guts out.

Poetical that, Mister Browning.