Grab a Measuring Tape:
Use a flexible measuring tape or ruler for accuracy. If you don’t have one, use a string and measure it against a ruler afterward.
Measure the Diameter:
Measure the inside diameter of the cup holder at the top. This is the width from one side to the other. Be sure to measure the widest part of the holder for accuracy.
Measure the Depth:
Next, measure the depth of the cup holder, which is how deep it goes from the top to the bottom. This ensures your coaster fits comfortably.
Check for Shape:
Some cup holders may not be perfectly round. If that's the case, measure the diameter across multiple points to ensure a proper fit.
