How to choose the best mattress for kids

Sleep is essential for childhood growth and development. The right mattress provides the support and comfort kids need for deep, restorative rest, helping them wake refreshed and ready to learn, play and grow.

When choosing a mattress for your child, key considerations include: size, support, firmness, comfort and safety. This guide will help you navigate the options, avoid common pitfalls and select a bed that offers peace of mind for parents and healthy sleep for kids.

JUMP TO
Why mattress choice matters for kids.
Key factors to consider.
How to choose the right mattress.
Common problems with kids’ mattresses.
Sealy New Zealand recommendations.
Final word.
FAQs.

Why mattress choice matters for kids

Children and teenagers require more sleep than adults to support growth and brain development. During rest, the body releases hormones that build muscle, bone and tissue, while also strengthening the immune system.

Sleep also fuels the brain – enhancing memory, problem-solving and emotional regulation. The right amount of rest helps children stay balanced, supporting their mood, behaviour and healthy growth.

A supportive, durable mattress is therefore vital to ensure kids get the quality sleep they need.

Key factors to consider

Size & age suitability

Babies & Toddlers: Cot mattresses are suitable early on

Primary School Age: Single mattress is the most common choice

Tall Children: Single XL offers extra legroom

Growing Room: King Single provides more width and length

Teenagers: For more space, consider a Double or Queen

Appropriate support

Spinal health is critical during growth years. Look for mattresses with orthopaedic support that maintain natural alignment. Sealy Posturepedic mattresses are designed with input from the Orthopaedic Advisory Board, and feature patented coil systems and comfort layers that adapt to growing bodies.

Firmness level

Children typically need fewer comfort layers than adults. Firm to medium mattresses are often best, providing stability without excessive softness. At Sealy New Zealand, we offer a range of comfort feels, from ultra firm to ultra plush. Sealy-trained in-store consultants can help identify the right option for your child’s posture and sleep profile.

Safety & materials

Guardrails: Can be helpful for toddlers transitioning from cots

Edge Support: Prevents roll-out and extends the usable sleep surface; our Sealy mattresses feature a reinforced edge technology for added stability

Allergy-friendly fabrics: Our SmarTex® with HealthShield® draws away moisture, helps regulate temperature and maintains a hygienic sleep surface

How to choose the right mattress

When shopping, involve your child where possible – comfort is personal, even for kids.

Keep these tips in mind:

Balance budget with quality and durability
Match mattress size to your child’s needs and take into account the bedroom size
Consider your child’s sleep position when choosing firmness

Common problems with kids’ mattresses

Lack of edge support

Without reinforced edges, children may roll out or feel unstable sitting on the side of the bed

Poor comfort & support

Cheap mattresses often lack durability, leading to restless sleep and body aches

Sealy New Zealand recommendations for kids' mattresses

We recommend the following mattresses for children and teenagers:

BEST OVERALL

Sealy Posturepedic: Orthopaedic support and durability designed for growing bodies (try our Sealy Bed Selector to discover the perfect option)

BEST BUDGET OPTION

Sealy Advantage: Offering quality support at an affordable price point. View the range.

Final word

Choosing the right mattress for your child is an investment in their health, comfort and future. With our trusted designs and advanced sleep technology, you can be confident your child is getting the support they need for many years to come.

FAQs

The ideal mattress for children provides room to grow, along with reliable support and comfort for developing bodies. Our Sealy Posturepedic mattresses are designed with orthopaedic excellence, helping ensure your child gets the restorative sleep they need. Visit your local Sealy stockist to experience the Posturepedic difference.

Most young children are well suited to a Single mattress (91.5cm x 190cm). If your child is likely to be tall, consider a Single XL (91.5cm x 203cm) or a King Single (105.5cm x 203cm) for extra legroom and space.

Comfort levels depend on your child’s sleep position and preferences. While some children may prefer a softer feel, many benefit from a medium to firm mattress. Our Sealy Bed Selector can provide tailored recommendations based on your child’s needs.

There’s no one-size-fits-all answer. The right comfort level depends on your child’s posture and sleep style. Medium mattresses often strike the best balance, but firm or soft options may also suit. Head into your local Sealy stockist to see what option might be best for your child.

Most children transition from a cot to a larger bed around 2–3 years old. Their new mattress should be supportive, durable and safe, with plenty of room to grow. Our range of Single, Single XL and King Single mattresses are designed to meet these needs.