Pillow Cube Pillow Reviews
Square-edged pillows built for one position
Pillow Cube built an entire brand on a single geometric argument: a side sleeper's head and shoulder form a right angle, so the pillow filling that gap should be a rectangle rather than a squashy oval. It is a genuinely useful idea for dedicated side sleepers with broad shoulders, and a genuinely bad one for anyone who rolls onto their back. Sizing is the whole game here — the loft is fixed, so measuring shoulder width before ordering matters more than with any other brand we cover.
These are research picks based on manufacturer specifications and our research, not hands-on testing. See how we test pillows
What Pillow Cube does well
- The square profile fills the shoulder gap better than a traditional pillow
- Firm edge support that does not collapse under a heavy head
- Clear sizing guidance tied to shoulder width
Watch-outs
- Fixed loft — the wrong size cannot be corrected after purchase
- Uncomfortable for back and stomach sleepers, so poor for combination sleepers
- Solid foam retains heat
Best for: Dedicated side sleepers with broad shoulders who never roll onto their back
Pillow Cube Side Cube Original
A cube-shaped memory foam pillow engineered to fill the shoulder-to-ear gap and keep the spine perfectly aligned.
Verified specs: Solid memory foam block fill · Choose 4, 5 or 6 in by shoulder width loft · firm feel · 60 nights trial · 3 years warranty.
Research pick — based on manufacturer specifications and our research.
Pillow Cube Side Cube Deluxe
The larger, 5-inch version of the cube-shaped side-sleeper pillow, with ventilation holes for ear pressure and a softer outer shell than the original.
Verified specs: AeroPluff memory foam fill · 5 inches (Standard) loft · firm feel.
Research pick — based on manufacturer specifications and our research.
Comparing brands? Start with our overall best pillows list or the pillow finder.
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