Guide 2

How to measure sag

Use a straight edge and a ruler so the depth of the dip can be clearly seen.

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Example showing how to measure mattress sag

How to take this photo

1

Place a straight edge, such as a broom stick, across the mattress.

2

Put a ruler in the deepest part of the dip without touching stitching.

3

Take a close, clear photo so the ruler markings can be read.

Checklist

  • The straight edge is visible across the mattress.
  • The ruler is placed in the lowest point of the sag.
  • The measurement marks can be read clearly.