Yes, we do offer custom mattress sizes

If you’ve got a non-standard bed frame or a custom cot design, you’re not alone. That’s why Sunday makes it easy to get a mattress in the size you need—without compromising on comfort or construction.

Here’s how it works

All Sunday mattresses are made of high-quality foam and natural materials. This gives them a slight, safe compression range. So, for example:

  • A 72"x78" mattress can comfortably fit a bed base that’s 71"x77"—just 1 inch shorter in both directions.
  • This built-in adjustability means many "custom sizes" don’t need full rework—they already fit well.

But if you have a very specific size—like 69"x79"—yes, we can make that too. Just reach out.

Need something truly custom?

Whether it's an unusually shaped bed, a made-to-order base, or even a bunk-style WorkPod setup, we’ve got you. For one-off orders or bulk custom sizing, just drop us a note. We’ll check feasibility and timelines right away.

Email us at hello@sundayrest.com or call us directly. And if there’s a size we should consider offering as a standard option, tell us—we love customer-led design.

A quick note about foam compression

Because we never fold our mattresses, there’s some light compression during shipping. That’s normal with high-density foam.

Here’s what to do:

  • Unzip the outer cover
  • Gently wiggle the mattress corners
  • Let it breathe for 2–3 days—just don’t close the zipper while it expands
  • You can still sleep on it during this time

This process helps it settle into its full shape naturally, without damaging the foam’s internal structure.

Tip: Custom setups work best with the right base

If you’re designing a custom sleep nook, you might also want to check out:

  • Sunday Tilt Bed – a sleek, tilt-up bed base with storage and breathability
  • Sunday WorkPod – ideal for studio apartments or multi-use spaces

Both are engineered to support foam mattresses properly—no sag, no squeak, no compromise.

Related reads you might find useful