Decide on the area in which you wish to hang your sun catcher. For best results, choose a place that receives a great deal of natural light.
Measure the distance from the spot on which you are hanging the sun catcher, such as the top of a window frame, to the height at which where you would like it to hang. Cut a length of string that is double that measurement.
Locate the area in which the string is to be inserted in the sun catcher. It should already have a ready-made hole, pin or loop from which to hang the string. Often this is located in the middle top section of the design.
Insert the string through the hole or loop in the sun catcher so that there is an additional 4 inches of string emerging from one side of the sun catcher. Tie this end of the string around the other piece of string in a secure knot. Repeat with a second knot.
Trim off any excess string with the scissors.The sun catcher is now ready to be hung from the desired area.