Body Pillow Guide: Shapes, Fills & Who Needs One

A body pillow is a long, full-length pillow that supports your entire body — head, shoulders, hips, knees, and feet — instead of just your head. They've quietly become one of the most useful sleep accessories in Australian bedrooms, particularly for pregnant women, side sleepers, and anyone with back or hip discomfort.

Key Takeaways

• A body pillow is typically 120–140 cm long — designed to support your whole body in side-sleeping positions.
• Best for: pregnant sleepers, side sleepers, those with hip or back discomfort, and anyone who hugs a pillow when sleeping.
• Shapes range from straight (simplest) to C, U, and J shapes (full-surround support).
• Fills include memory foam, polyester, down, buckwheat, and cooling gel — each with different feel and care needs.

This guide covers what a body pillow does, who benefits most, the main shapes and fills, and how to choose the right one for your sleep style.

What Is a Body Pillow?

A body pillow is a long pillow — typically 120–140 cm — designed to support your body from head to feet during sleep. Unlike a standard pillow, which only supports your head and neck, a body pillow follows the length of your torso and legs, providing alignment support for the hips, shoulders, and lower back.

Length and proportions. Standard body pillows run 120–140 cm long and 30–50 cm wide. The length is roughly equivalent to half a queen mattress, so the pillow runs from your shoulder down past your knees when you sleep on your side.

Full-length support concept. When you cuddle a body pillow on your side, it does two jobs at once: gives you something to wrap your arms around (supporting the upper body) and a soft surface to drape your top leg over (supporting hip alignment). Together, this distributes pressure and reduces the strain on your back and joints.

Different from standard pillows. A regular pillow supports the gap between your head and the mattress. A body pillow supports the gaps between your shoulder, knees, and feet — the alignment problems that side sleepers and pregnant sleepers most commonly struggle with. They're complementary rather than alternatives: most sleepers use both, pairing a head pillow like the Koala Pillow [2nd Gen] with a body pillow for full coverage. 

Growing popularity. Body pillows used to be specialty items mostly bought during pregnancy. Now they're mainstream — used by side sleepers, anyone with hip or back discomfort, and people who simply find them comforting to sleep with.

Who Needs a Body Pillow?

Body pillows aren't for everyone, but they're transformative for specific groups of sleepers.

Pregnant sleepers. According to NSW Health, sleeping on your side from 28 weeks of pregnancy halves the risk of stillbirth compared to back sleeping — either side is equally safe. Body pillows make that position easier to hold overnight, supporting the belly's weight and easing lower-back pressure as traditional pillows fall short. 

Side sleepers. Side sleeping puts pressure on the shoulder and hip against the mattress. According to the Sleep Foundation, a pillow between the knees keeps the hips and spine aligned by stopping the top leg pulling the spine out of position. A body pillow does the same and adds a surface to hug, easing common side-sleeper aches. 

Those with back discomfort. A body pillow between the knees keeps the hips, pelvis, and spine in a more neutral position when side sleeping, which often reduces lower back tension. (Persistent back pain warrants a chat with a GP or physio — a body pillow is a comfort aid, not a treatment.)

Pillow huggers. If you naturally curl around a pillow or wedge one between your knees, a body pillow gives you a single, full-length surface that does both jobs at once — and usually sleeps better than a stack of regular pillows. 

For more on which sleep position suits you, see our best sleeping position guide.

Body Pillow Shapes & Styles

Body pillows come in several shapes, each designed for different support needs.

Straight body pillow. A long rectangular pillow — the simplest design and the most versatile. Works for general side sleeping, hugging, and leg support. The most common option for non-pregnancy use.

C-shaped (pregnancy standard). A C-curve that wraps around the front of your body, supporting the belly, with a tail that goes between or under the legs. Designed specifically for pregnancy, but useful for any side sleeper who wants front-and-back support.

U-shaped. A full U that surrounds the body — head, both sides, and between the knees. Maximum support, but takes up significant bed space. Best for solo sleepers or those with very large beds.

J-shaped. A J-curve that supports the head, neck, and one side of the body. Less bulky than C or U shapes while still providing more contoured support than a straight pillow.

Cooling designs. Some body pillows use gel-infused foam, breathable bamboo covers, or open-cell foam construction to reduce heat buildup — useful in Australian summers.

Specialised pregnancy pillows. Some pillows combine specific shapes with adjustable inserts so the support changes through different stages of pregnancy.

Fill Materials & Types

The fill inside a body pillow determines how it feels, how long it lasts, and how it's cared for.

Memory foam. Conforms to your body shape and holds support consistently — ideal for firm, contoured comfort. Trade-offs include heat retention (less so with gel-infused or open-cell varieties) and a brief settling-in period. According to the Sleep Foundation, new memory foam has a faint chemical smell for 3–7 days after unboxing, with most volatile organic compounds (VOCs) dissipating within 2–4 weeks. CertiPUR-US® certified foam tests below WHO and EPA residential air quality limits, so the smell fades quickly. 

Shredded memory foam. Memory foam in small pieces rather than a solid block. More adjustable and breathable than solid foam, while still providing structured support. Many pregnancy pillows use shredded foam.

Polyester fibre. The most affordable option. Soft, lightweight, and easy to wash. Compresses faster than foam, so the lifespan is shorter, but the price is hard to beat for occasional use.

Down and down alternative. Soft, fluffy, and luxurious. Down compresses significantly, so it works best for those who want a cuddly rather than supportive feel. Down alternatives (microfibre/polyester) mimic the feel without the allergens.

Buckwheat hull. Natural, firm, and adjustable. The pillow holds its shape under your weight and conforms to your body. Heavier than foam or fibre. Popular among those who prefer firmer, more traditional support.

Gel-infused foam. Memory foam with cooling gel beads or layers. Sleeps cooler than traditional memory foam — useful in Australia's warmer regions.

Latex. Naturally firm, responsive, and breathable. Eco-friendlier than synthetic foams. Heavier and more expensive, but very durable.

For more on foam construction generally, see our foam mattress guide.

Size & Dimensions

Body pillows follow rough size standards, though specific dimensions vary by brand.

Standard length. Most body pillows are 120–140 cm long. This length corresponds roughly to half the length of a queen mattress, which means the pillow runs from your shoulder past your knees when you sleep on your side.

Width and loft variations. Width typically ranges from 30 to 50 cm, with loft (height when lying flat) anywhere from 10 to 25 cm depending on the fill. Firmer-fill pillows tend to be loftier; soft-fill pillows compress more.

Bed compatibility. A 120 cm body pillow fits comfortably on any bed from a single (92 cm wide) upward. Larger U-shaped pillows need queen-size or bigger beds to fit comfortably.

Height and body coverage. A 130 cm pillow fits most adults from shoulder to knee. Taller sleepers (190 cm+) may want longer pillows; shorter sleepers may find 110 cm pillows sufficient.

Travel vs full-size. Some brands offer compact travel body pillows (60–80 cm) for hotel stays or smaller couches. They don't provide the same level of support as full-size pillows but are useful for occasional use away from home.

Benefits for Pregnancy

Body pillows are particularly popular during pregnancy because they make side sleeping more comfortable as the body changes. 

Supporting belly weight. A C-shaped body pillow tucks under the belly so you don't have to support the weight yourself when side sleeping.

Easing pressure points. A pillow between the knees and one to hug helps distribute weight evenly, reducing the pressure on hips and lower back that many pregnant sleepers notice in the second and third trimesters.

Holding the recommended sleep position. NSW Health recommends sleeping on your side from 28 weeks of pregnancy. A body pillow makes that position easier to settle into and stay in overnight.

Sleep quality during pregnancy. Body pillows have become standard pregnancy gear in Australia because they often make a noticeable difference to overnight comfort.

Pregnancy sleep is individual — if you have any concerns about your sleep, talk to your obstetrician or midwife.

Body Pillow for Side Sleepers

Side sleepers benefit from body pillows even outside pregnancy. The right pillow setup transforms side sleeping from "okay" to "actually comfortable."

Shoulder alignment. A body pillow gives your top arm somewhere to rest other than draped over your other shoulder. This keeps the top shoulder from rolling forward and reduces the cervical strain that causes morning stiffness.

Hip support. A pillow between the knees prevents the top knee from collapsing inward and rotating the hip. Over time, this small adjustment significantly reduces hip and lower back tension for side sleepers.

Preventing arm numbness. Many side sleepers wake with numb arms because they sleep with their arm tucked under their head, restricting circulation. A body pillow gives you somewhere else to rest your top arm.

Partner accommodation. Some couples have one side sleeper and one back sleeper. A body pillow lets the side sleeper get full support without invading the back sleeper's space.

For a deeper look at head pillow choice by sleep position, see our best pillow for your sleep position guide — or jump straight to the Koala Pillow [2nd Gen], which has adjustable firmness designed for side and back sleepers needing extra neck height. 

Comfort & Support Features

Modern body pillows include features beyond the basic shape and fill.

Density and firmness. Look for pillows that match your sleep style:

• Soft: down or polyester fill, best for hugging comfort

• Medium: shredded memory foam, adaptable for most users

• Firm: solid memory foam or buckwheat, best for orthopaedic support

Adjustability. Some body pillows have removable inserts or adjustable fills, letting you customise the firmness over time.

Head and neck support. U-shaped and J-shaped pillows include built-in head support, eliminating the need for a separate pillow.

Leg cradle design. Specialised pregnancy pillows often have a contoured leg section that cradles the upper leg in proper alignment.

Cooling technology. Gel-infused foam, breathable bamboo covers, and open-cell construction all reduce heat retention. Worth seeking out if you sleep warm or live in humid coastal Australia. For your head pillow, Koala's 2nd Gen Pillow takes a different approach — heat-dissipating PolarBands® and a CoolThread™ summer-side fabric that tests 2.7°C cooler than the previous generation. 

Hypoallergenic materials. Down alternatives, polyester, and bamboo covers all suit allergy sufferers. Buckwheat hull pillows are also naturally hypoallergenic. 

Care & Durability

A body pillow is a substantial investment, so proper care extends its useful life.

Washable cover benefits. A removable, machine-washable cover is essential. The cover takes most of the wear and absorbs sweat and oils — being able to wash it weekly keeps the pillow fresh for years.

Pillow lifespan. According to the Sleep Foundation, most pillows should be replaced every 1–3 years, depending on fill and care. Body pillows get less concentrated head pressure than standard pillows, so they tend to sit at the longer end of each range: 

• Polyester fibre: 2–3 years
• Memory foam: 3–5 years
• Buckwheat or latex: 5+ years

Fluffing and maintenance. Polyester and down-fill pillows benefit from regular fluffing — squeeze and shake to redistribute the fill. Memory foam pillows hold their shape and don't need fluffing.

Storage. Store body pillows in a breathable cotton bag (not plastic) when not in use. Plastic traps moisture and can cause mould or odour.

Longevity tips.

• Use a cover and wash it every 1–2 weeks
• Air the pillow itself in sunlight every 1–2 months
• Spot-clean stains immediately
• Avoid eating or drinking on the pillow

Signs to replace. Lumpy, flat sections that don't recover, persistent odour even after washing, or visible yellow stains all signal it's time for a new pillow.

Need a head pillow to go with it?

A body pillow supports your shoulders, hips and knees — but your head and neck still need their own pillow. The Koala Pillow [2nd Gen] has adjustable firmness, a reversible seasonal cover, and PolarBands® that draw heat away while you sleep. Feather-free, washable, and backed by a 120 day trial. 

Shop Koala's pillow range →