The tag wiki for the knots tag currently reads "utility of or method of tying knots for use in any of the following activities" followed by a bullet list of a few obviously outdoor-related activities.
Meanwhile, a user has recently come along, on April 9, 2018, asking about a good knot to use to create an adjustable loop in a length of leather cord, and revealed that this would be used for a piece of jewelry. Because of this, the question is receiving down votes and close votes.
NOTE: The question was edited on April 11, 2018, and the reference to jewelry, as well as type of cord (leather) were removed. Here is the text of the original.
Apologies for the incompleteness of my former entry here. My question relates to a leather thong loop used to hang a pendant on. The knot needs to be at the point of the join of the 2 ends so that it will sit at the back of the neck. I can remember seeing this knot a long time ago on a pendant from India and it meant the length of the pendant could be adjusted from almost zero to any length at all but clearly only as wide as the back of the wearers neck is best for aesthetic reasons I don't know if there are any commonly used "outdoor" knots that might suit but thought it worth a try. Hope someone can help.
This has me wondering, consider the following two examples:
I need a knot that forms an adjustable loop, so as to hang fenders from the railing of my pontoon boat.
I need a knot that forms an adjustable loop, so as to hang a sun-catcher from the rod of living room curtains.
The two questions begin the same and will have essentially the same answer. Therefore, we need to decide whether we will judge the first question as on-topic and the second off-topic. Also, what if the question did not specify the intended use at all?
I need a knot that forms an adjustable loop, so as to hang a modest weight object from a vertical bar.
I am intentionally not stating my own opinion here nor my arguments for that opinion. I want to see what the community will have to say.