Quick summary: If your new Sunday mattress measures a little small at first, don’t worry. Sunday never compresses or vacuum-packs its mattresses, but a mattress can be folded or bent in transit. Unzip the cover, lay it flat, and it will settle back to full shape.

Just received your mattress and it looks a bit smaller than expected? No need to stress—this is completely normal and temporary.

Why your mattress might measure a little small

Sunday never compresses, vacuum-packs or roll-packs its mattresses. What can happen is that the mattress gets folded or bent on its way to your bedroom—particularly when it has to be carried up a staircase or manoeuvred into a lift. As a result, it might measure shorter or narrower when you first unwrap it. Laid flat, it settles back to full shape in a short time, and none of this affects the quality, comfort, or longevity of the mattress.

Here’s what to do (and not do)

  • Unzip the outer cover of the mattress.
  • Gently lift or wiggle the edges of the mattress to straighten out any folded corners.
  • Lay the mattress flat and leave the zipper open for a couple of days so it has room to settle back to shape.
  • Continue using the mattress as usual—it’s completely fine to sleep on it during this period.

Important: Avoid closing the zipper immediately. Giving the foam space helps it regain its intended shape more easily.

Still unsure? Watch this short video

Need help?

If the mattress still hasn’t settled back to full shape after a couple of days, or you just want a quick reassurance, email us or give us a call. Our team’s here to help, no matter what.

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