The quarter serves as a 1-inch ruler to gauge mattress depression depth without pressure applied. If it can't stand upright in the deepest part, place it where it can stand to help accurately assess the impression for evaluation.
Good question. The quarter acts as a ruler because it is exactly 1 inch in diameter. By placing it next to the straightedge, it helps us visually gauge the depth of the depression or sag and confirm whether the end-to-end measurement is valid.
When taking the photo, please ensure there is no weight or pressure on the mattress, as this can affect the measurement.
If the quarter will not stand upright in the deepest part of the indentation, simply place the quarter in the deepest area where it can remain standing on its own. This will still allow us to accurately assess the depth of the impression.
We request this specific photo because it helps us better understand and evaluate the issue you are experiencing with your product.