Quick Answer
The Pillow Cube is a dense, square-shaped memory foam pillow designed specifically for side sleepers. Starting at $125 USD for the standard model, it comes in 5", 6", and 6" Pro thicknesses. The boxy shape is meant to fill the gap between your shoulder and head without compressing flat overnight. It works well for committed side sleepers who need firm, consistent loft, but it is not a good fit for back or stomach sleepers.
Brad, Owner since 1987: "We have been helping Brantford families sleep better since 1987. Every customer gets personal attention, honest advice, and the kind of follow-up service you just do not get from big box stores."
If you sleep on your side, you have probably stacked two pillows on top of each other at some point. Or folded one in half. Or shoved your arm underneath for extra height. The problem is real: most pillows are too thin and too soft to keep a side sleeper's head level with their spine. The Pillow Cube is one company's very literal answer to that problem. It is a square block of memory foam, and it looks exactly like it sounds.
What Makes a Cube Pillow Different
Traditional pillows are rectangular, soft, and designed to work in multiple sleeping positions. The Pillow Cube throws all of that out. It is a solid block of memory foam cut into a square shape, roughly the width of your head. The idea is simple: side sleepers need height, not surface area. A wider pillow just means more material that is not doing anything useful.
The foam itself is quite dense. Noticeably heavier than a standard pillow. That density is the point. Where a traditional pillow compresses under the weight of your head over a few hours, the Pillow Cube holds its shape through the night. Brad, who has been fitting customers for mattresses and bedding for over 38 years, often points out that pillow loft consistency matters more than initial loft. A pillow that starts at six inches but sinks to three by midnight is really a three-inch pillow.
There are two main versions. The standard Pillow Cube is solid memory foam at $125 USD. The Ice Cube model adds a cooling gel infusion for sleepers who run warm, at a higher price point. Both come in three thicknesses: 5 inches for smaller frames, 6 inches for average builds, and the 6" Pro for broader shoulders or larger frames.
Choosing Your Cube Size
Measure the distance from the tip of your shoulder to the side of your neck while standing straight. If it is under 5 inches, go with the 5" model. Most average-build adults land in the 6" range. If you have broad shoulders or sleep on a softer mattress that lets your shoulder sink deeper, the 6" Pro gives you extra room. Getting the wrong height defeats the entire purpose of the pillow.
The Honest Mixed Bag
The Pillow Cube went viral on TikTok and even appeared on Shark Tank, which brought it a huge wave of attention. The reviews since then have been genuinely split.
Supporters love the firm, unwavering support. Side sleepers who have dealt with neck pain from collapsing pillows often describe it as the first pillow that actually kept their head where it should be all night. The 60-night trial period gives enough time to adjust, which matters because dense memory foam does have a break-in period.
Critics find the rigid, boxy shape uncomfortable. If you shift positions at all during the night, rolling onto your back on a 6-inch foam block is not pleasant. Dorothy, our sleep specialist, notes that very few people sleep in one position exclusively. It is difficult to say whether the Pillow Cube works for someone who is mostly a side sleeper but occasionally rolls over. That transition from side to back on a thick, firm square can wake you up. Stomach sleepers should avoid it entirely.
The weight is another thing people mention. It is a dense block of foam. Do not expect to fluff it or fold it. It is what it is.
Try Before You Commit
Ordering a specialty pillow online means guessing at your size and hoping the feel works for you. At our Brantford showroom, Talia can walk you through our pillow and bedding options and help you find the right loft and firmness for your sleeping position. Testing in person takes the guesswork out of it.
Pairing Your Pillow with the Right Mattress
A pillow does not work in isolation. The mattress underneath you determines how far your shoulder sinks, which changes how much pillow height you actually need. A firmer mattress keeps your shoulder higher, so you need a thicker pillow. A softer mattress lets you sink in, reducing the gap.
Side Sleeper Pairing
For side sleepers investing in proper head and neck alignment, the mattress matters just as much as the pillow. The Restonic Revive Tiffany Rose/Jasmine Quee
n at $2,995 features 1,188 individually wrapped coils in a 13-inch profile, giving side sleepers deep pressure relief at the shoulder and hip while maintaining the kind of consistent surface that lets a pillow like the Cube do its job properly.
Who Should Consider a Cube Pillow
The Pillow Cube is a niche product that solves a specific problem well. If you are a dedicated side sleeper, you have tried multiple pillows without finding enough loft, and you do not mind a firm feel, it is worth a look. The 60-night trial helps.
If you switch positions, sleep on your back part of the night, or prefer a softer feel, this is probably not for you. A good cervical pillow designed for neck support may serve you better. And if you are a side sleeper dealing with hip or knee discomfort along with neck issues, pairing the right head pillow with a knee pillow for side sleeping addresses alignment from both ends.
Is the Pillow Cube available in Canada?
Pillow Cube ships from the United States. Canadian orders may incur additional shipping costs and duties. The $125 USD starting price will also be subject to exchange rates. Check the Pillow Cube website directly for current Canadian shipping options.
What is the difference between the standard Pillow Cube and the Ice Cube?
The standard model is solid memory foam. The Ice Cube version adds cooling gel infusion to the foam, which helps dissipate heat for sleepers who tend to overheat at night. Both have the same square shape and size options.
Can I use a Pillow Cube if I sleep on my back?
It is not recommended. The 5 to 6 inch height is designed to fill the side-sleeping gap between shoulder and head. For back sleepers, that much loft pushes the head forward and strains the neck. A thinner, contoured pillow is a better choice for back sleeping.
How long does a Pillow Cube last?
Dense memory foam pillows generally hold their shape for 3 to 5 years with regular use. The Pillow Cube's solid construction may push toward the longer end of that range, but foam does gradually soften over time regardless of density.
Does Mattress Miracle carry the Pillow Cube brand?
We do not carry the Pillow Cube brand specifically, but we stock a range of side-sleeper pillows with similar loft and support characteristics. Visit our showroom to compare options in person and find the right fit for your build and sleeping position.
Visit Our Brantford Showroom
Mattress Miracle
441 1/2 West Street, Brantford
Phone: (519) 770-0001
Hours: Mon-Wed 10-6, Thu-Fri 10-7, Sat 10-5, Sun 12-4
Our team has 38 years of experience helping customers find the right sleep solution. Call ahead or walk in any day of the week.
Sources
- Gordon SJ, Grimmer-Somers K, Trott P. Pillow use: the behaviour of cervical pain, sleep quality, and pillow comfort in side sleepers. Manual Therapy. 2009;14(6):671-678. DOI: 10.1016/j.math.2009.02.006
- Gordon SJ, Grimmer-Somers KA, Trott PH. Pillow use: the behaviour of cervical stiffness, headache and scapular/arm pain. J Pain Res. 2010;3:137-145. DOI: 10.2147/JPR.S11074
- Erfanian P, Tenzif S, Guerriero RC. Assessing effects of a semi-customized experimental cervical pillow on sympathetic nervous system parameters. J Can Chiropr Assoc. 2004;48(1):20-28. PMCID: PMC1840035
- Persson L, Moritz U. Neck support pillows: a comparative study. J Manipulative Physiol Ther. 1998;21(4):237-240. PMID: 9608379