Miller's knot

Miller's knot
ABoK #1241 around the neck of a paper bag
Names	Miller's knot, sack knot, bag knot
Category	Binding
Related	Ground-line hitch, constrictor knot, strangle knot, clove hitch, Bottle sling
ABoK	#388, #389, #390, #1241, #1242, #1243, #1244, #1674, #260, #1142, #2007, #2186, #2300, #2554

A miller's knot (also sack knot or bag knot) is a binding knot used to secure the opening of a sack or bag. Historically, large sacks often contained grains; thus the association of these knots with the miller's trade. Several knots are known interchangeably by these three names.^[1]

Constrictor makes a fiercer binding knot, but Miller's/Bag is suitable for most applications, and is easier to tie/untie. Miller's/Bag makes a great hitch, like the similar Ground-Line. Binding usage has force emanating from inside rope ring evenly, hitch usage has force input from one side, then reducing around.