OakHand Aluminum Skateboard Deterrent for Handrails with 1.9" O.D.
How to Properly Measure the Diameter of Handrails:
Step 1: Align a piece of paper along the outside of the rail.
Step 2: Wrap the paper around the rail.
Step 3: Draw a line where the paper meets.
Step 4: Lay the paper flat and measure the distance from the edge of the paper to your line.
Step 5: Calculate the pipe diameter by dividing year measurement by 3.14
Circumference (Your Measurement) ÷ 3.14 = Diameter
(Please see attachment for a more detailed illustration)