Lanyards are worn around your neck and used for such things as ID cards and keys. For light use they can be made adjustable from a single paracord. However they can be made to hold a dozen or more keys, such as the one shown below.
This one is made from 4 paracord strands in a round braid to hold several dozen keys. The loop is about 14" stretched tight, with a 3" backsplice and additional brading at the business end.
This one incorporates a Lanyard Knot plus some braiding. The braid is one I developed and call 'Overhand Braid'.
A longer one, single strand with another softer material braided for comfort on your neck.