If you sleep on your side, you’ve probably woken up with an aching hip or a numb arm. A body pillow can help. Hug it, rest your top leg on it, and your spine stays straighter while your knees stop grinding against each other.
Knowing how to use a body pillow for side sleeping makes all the difference, though. Place it badly and it just gets in the way. Here’s how to set it up, step by step, and how to choose one that fits.
Why side sleepers love body pillows
When you lie on your side, gravity pulls your top leg forward and down. That twists your hips and pelvis, and your lower back may pay for it by morning. A long pillow fills the gap between your body parts, so nothing sags or twists.
It also gives your top arm somewhere to rest, which takes pressure off your shoulder. For many people, that’s the biggest win.
How to position a body pillow, step by step
Try this setup and adjust to what feels comfortable.
- Lie on your side with your head on your regular pillow.
- Place the body pillow in front of you, running from chest to knees or lower.
- Bend your top knee and rest that leg on the pillow so your knee sits level with your hip.
- Hug the upper part of the pillow with your top arm, keeping your shoulder relaxed rather than hunched.
- Check your spine. From behind, your head, neck and hips should look roughly like a straight line.
If your top knee drops lower than your hip, the pillow is too thin or too flat. If your hip rides up, it’s too thick.
Where to put it for knees, hips and shoulders
Different aches call for slightly different spots, so here’s a quick guide.
- Knees: Let the pillow sit between your knees and ankles so your legs stay apart and parallel.
- Hips and lower back: Keep your top knee bent and raised to hip height. Hug the pillow so your pelvis doesn’t roll forward.
- Shoulders: Rest your top arm across the pillow’s upper section. This keeps the shoulder from collapsing inward.
- Pregnancy or tender joints: A pillow that wraps your back can add support behind you as well. Ask your doctor about safe sleeping positions.
How to choose the right length
Body pillows usually run from about 48 inches up to 60 inches or more. A longer one supports you from shoulders to ankles, while a shorter one suits smaller frames or narrow beds.
Think about how much of your body you want supported. If you mostly need knee and hip support, a standard length works. If you like to hug and wrap, go longer. And remember your bed’s width: a very big pillow can crowd out a partner.
Which fill works best?
Fill decides how the pillow feels and how long it holds its shape.
- Polyester fiber: Soft, easy to wash and usually lighter on the budget. It can flatten over time.
- Shredded memory foam: Firm, shapeable and good at holding a bend. It can feel warm.
- Down or feather: Airy and soft, but not ideal if you have allergies.
- Natural fills such as buckwheat or latex: Very supportive, though heavier and sometimes noisy.
Hot sleepers should look for breathable covers, since a big pillow adds heat. If you’re also choosing a head pillow, our guide to the best adjustable bed pillows shows how adjustable loft helps keep your neck aligned.
Common mistakes to avoid
Once you’ve got the basics, a few errors can undo the benefit.
- Using a pillow that’s too soft, so your knee still drops.
- Letting your top shoulder roll forward instead of resting on the pillow.
- Skipping a head pillow and expecting the body pillow to do everything.
- Never washing the cover, which adds dust and sweat.
- Using one for a baby or toddler. Big soft pillows aren’t safe in a crib or for infant sleep.
Give any new setup a week or two. Your body needs time to adjust to a new sleeping position.
Pairing a body pillow with other bedding
A body pillow works best as part of a comfortable setup. Some people like the extra calming feel of a weighted blanket sized to your body, though you’ll want to make sure the combination isn’t too warm. Our roundup of the best weighted blankets for adults is handy if you’re curious.
Frequently asked questions
Where should a body pillow go when sleeping on your side?
Place it in front of you, running from chest to knees. Rest your top leg and arm on it so your hips and shoulders stay level.
Is a body pillow good for back pain?
It can help by keeping your hips and spine aligned, which eases strain on the lower back. If pain is ongoing or severe, see a healthcare professional.
How long should a body pillow be?
Most are between about 48 and 60 inches. Choose longer if you want full-body support, shorter for smaller frames or narrow beds.
The bottom line on using a body pillow
Keep your top knee at hip height, hug the pillow to support your shoulder, and match its length and fill to your body. When you’re ready to shop, our guide to the best body pillows for side sleepers is a good next stop.