A back-to-school must have: a well-fitted backpack
For kids of all ages, back-to-school shopping is an exciting time, it softens the sting of summer’s end!
And as parents and caregivers, we know the most anticipated item on those back to school supplies lists is the backpack! Every year brings new trends in styles, colors, designs and popular cartoon or video game character depictions.
The bag your student chooses will be with them every day for the entire school year, so of course it’s important to let them pick something they love. It’s just as important to make sure the one they choose fits week and supports their back, neck, and shoulders — keeping them comfortable, healthy and ready to learn.
As you shop for back to school supplies, put backpack safety first.
What does “backpack safety” mean?
The US Consumer Product Safety Commission reports that backpack safety is no small matter. In fact, from 2019 to 2021, an estimated 1,200 children under age 19 were treated in emergency rooms each year for backpack-related injuries.
When a backpack doesn’t fit properly, is worn incorrectly, or is overloaded, it can quickly shift from being a convenient school essential to a source of pain.
Heavy or ill-fitting backpacks can:
- Strain muscles and joints
- Cause neck, shoulder, and back pain
- Affect posture and daily activities
Kids’ spines are still developing, so even mild discomfort shouldn’t be ignored. The National Spine Health Foundation warns that over time, poor backpack habits can cause spinal compression, muscle imbalances, and even nerve damage.
Top 3 tips for safe backpack wearing
Check out the video below, where physical therapist Matt Rogers shares 3 tips his family follows when checking backpack fit and function.
How to choose the right size backpack for your child
A poor-fitting backpack is one of the most common causes of lower back pain in kids, so choosing the right size should be a top priority. Have your child try on the backpack they want, then check these fit guidelines:
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Width: The backpack should be no wider than your child’s torso.
Quick test: If their arms bump the backpack when swinging naturally, it’s too wide. -
Height: With straps adjusted, the bottom of the backpack should sit no more than 2 inches below the waistline.
Quick test: If the bottom touches the seat when they sit, it’s too tall. - Strap anchor point: The point where the shoulder straps attach to the pack should be no more than 2 inches below the top of the shoulders.
- Overall fit: The backpack should rest snugly against the back without gapping or hanging away from the body.
Choosing the right size backpack not only ensures a proper fit — it also helps prevent overpacking. When a pack is proportionate to your child’s body, its capacity is more likely to align with recommended weight limits.
A widely accepted guideline from musculoskeletal health experts is the 10% rule: a child’s backpack should weigh no more than 10% of their body weight. For example, if your child weighs 80 pounds, their backpack should be no heavier than 8 pounds when fully packed.
Sticking to this limit helps reduce the load on growing spines and developing muscles, making it easier for kids to maintain good posture and avoid fatigue throughout the school day.
Beyond size: functional features to look for in a school backpack
A well-fitting backpack is just the start. Ergonomic features can make a big difference. Look for:
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Two wide, padded, adjustable straps to keep weight even and close to the body.
Bonus: Waist or chest straps for extra support. - A padded, contoured back panel to protect from sharp items and encourage good posture.
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Multiple compartments to distribute weight evenly and keep items from shifting.
Tip: Place heavier items close to the body, in the center of the pack.
Parent Takeaway: Quick Backpack Safety Tips
- Choose properly sized packs with wide, padded straps
- Look for padded backs and multiple compartments
- Keep backpack weight under 10% of body weight
- Observe posture & watch for leaning and slouching
- Encourage your child to speak up about pain, discomfort, numbness or tingling
- Watch for difficulty putting it on or taking it off
- Act early — physical therapists can keep kids pain-free
For parents, caregivers, and professionals who also carry backpacks daily, the same principles apply. Check out our companion blog, 3 Steps to Prevent Neck & Back Pain from Backpacks, for a closer look at the optimal way to wear a backpack.
Set Your Child Up for a Healthy School Year
If your child is experiencing pain, posture changes, or discomfort from their backpack, our physical therapists can help. Schedule a visit today to keep them moving, learning, and feeling their best.
