Page 81 - Geoffrey Budworth, Jason Dalton "The Little Book of Incredibly Useful Knots"

Overhand shortening

There are two principal uses for this contrivance: learn one, get one free. It is an effective

shortening, tied in the bight, of any rope or webbing that is overlong for the job in hand; and it
may also be used to create a pair of fixed leg loops for a climbing harness.

Form an S-shape in the material to be tied (1) and press it together, taking care to keep the tape or
webbing flat and untwisted throughout (2). Tie an overhand knot in the triple thickness, once

more ensuring that no unwanted twist occurs (3, 4). Pull everything snug and tight (5).