Write the next sentence in the following story.

How to measure a mattress
Take off any sheets, blankets, or pillows on your mattress.
You'll get the most accurate measurements when your mattress doesn't have anything on it. If you're measuring your mattress for fitted sheets or a comforter, and you have a padded mattress topper on your mattress, leave it on when you do the measuring.
Measure from the left side to the right side of your mattress to get the width. Use a tape measure or fabric ruler to do your measuring.