STEP 1: Measure and cut PVC pipes.
After measuring my SIL’s bed (she has a full size bed which is 54″x75″), I made my marks to cut my PVC pipes. I set my marks for 64″ and 88″ in order to have enough clearance from her ceiling fan.
In the end, if you’re only doing 3 sides like me, you should have 2 long pieces (88″ in my case) which will hang over the long sides of the bed and 1 shorter piece (64″ for me) which will hand over the foot of the bed. Of course, if you decide to do 4 sides, you’ll need 2 PVC pipes for either measurement.