The idea is to make a custom sized star to fit your or my application. If you are lucky and have all the materials laying around then you can save money too.
Here is a look at what we will be making.
Step 1: Determine your size.
So the first thing to do is determine where you would like your star to go. Next measure to find the approximate width of your star. Note the height of the star will be slightly less than the width. In the diagram below we just measured the line AC we will use that to find the length of the arms of the star (AF).
Note: Once the lights are added to the frame the width of the star will be greater then just the frame. To avoid making the finished star to large decrease your width (AC) by 1-1.5 inches.
The length of your arms (AF) will be approximately 38% of your width (AC). Once you do your calculation round the number to something nice (measurable).
Here's are the numbers for my star:
The width of my star can be 27". I multiply 27 by 38% or 0.38. The length I come up with is 10.26 inches. I round this down to 10.25". Nice and measurable!