You make a running long jump, moving at least 10 feet before jumping.
This means you jump from your current position to a new position on the x-axis.
This is calculated:
Creature Base Size + Body
You stare at the chasm's toothy grin, spikes gleaming in shadows. The runway, cracked stone, stretches long. The far ledge, rugged and scarred, waits. Dust dances in faint gusts, challenging your sprinting leap.