When and How to Switch to a Big Kid Bed

There comes a moment in every parent’s life when they look down at their not-so-little toddler and realize they need a bigger bed. The crib days are fading, the bedtime stories are getting longer, and, somehow, your little one is halfway up the side of their crib like a tiny rock climber.

If you’re wondering when and how to make the leap from crib to big kid bed, you’re in the right place. It’s one of those milestones that feels huge (because it is!) and can raise more questions than answers. Let’s explore the nuances of transitioning your child to a comfortable mattress.

 

 

When Should You Switch to a Big Kid Bed?

There’s no perfect age, but there are some solid signs it might be time. Most little ones make the move sometime between 18 months and 3 years. But don’t let that window make you rush. Every child’s timeline is different.

Here are some common signs your toddler might be ready:

• They’re climbing out of the crib (even once is enough!)
  

• They’re potty training or showing interest in it
  

• They’re too tall or too active for the crib space
  

• They’re asking for a “big kid bed” (or pointing to their older sibling’s bed with envy)

💡 Quick note from the AAP: If your child can climb out of their crib or is about 35 inches tall, it’s time to make the switch for safety.

 

 

Signs Your Toddler Is Not Ready for a Bed

It’s just as important to recognize when not to switch. The transition doesn’t always go smoothly if your little one isn’t quite there.

You might want to hold off if:

• They still sleep in a sleep sack and aren’t mobile enough
  

• They rely heavily on their crib for security and routine
  

• You’re about to move houses, start daycare, or welcome a sibling (too many changes can overwhelm them)
  

• They’re consistently leaving the bed after you say goodnight

If your transition to a toddler bed is not going well, it’s okay to pause and try again in a few weeks. 

 

What Size Bed Should You Choose?

Here’s where parents often get tripped up: Do I go straight to a twin? Is a toddler bed a must? What about a full-size bed for the long haul?

Let’s break it down:

• Toddler beds: These use the same mattress as a crib (so no upgrade there) but with a new bed frame and guardrails. They’re great for easing into the change, but may only last until age 5 or 6.
  

• Twin beds: The most common next step. They’re perfect for growing kids, especially when paired with a cozy mattress and safety rails.
  

• Full-size beds: Full mattresses are a smart choice if you want a bed that’ll last into the tween years. If you have the space (and a good sleeper), go for it.

👉 Bedzzz Tip: A lot of parents are skipping the toddler bed and heading straight for a twin mattress, especially if their child is already 3+ or on the taller side.

 

 

How to Make the Switch (Without Losing Sleep)

Alright, so your toddler is ready, but are you? Don’t worry; we have some tips to help make this change smoother for everyone.

1. Talk it up!

Make it a big, exciting milestone, like getting a new bike or starting school. Let them help pick out the bedding or even the bed frame if you’re upgrading.

2. Keep the routine the same.

Bedtime stories, favorite stuffed animal, white noise machine—keep the comforts of their crib life. The bed might be different, but the rest can stay the same.

3. Try a gradual approach.

If you’re nervous, start with naps in the new bed and crib at night. Or place the toddler mattress on the floor first to ease them in.

4. Use a toddler rail.

Even on a twin or full bed, a removable rail helps kids feel secure and stops those midnight roll-outs.

5. Stay consistent.

They’ll probably get out of bed a few dozen times the first week. Stay calm, keep walking them back, and avoid turning it into a game.

 

 

Top Big Kid Bed Picks from Bedzzz Express

Ready to shop for that big upgrade? These mattresses are perfect for toddlers making the leap, and they’re all available right here at Bedzzz Express.

Serta Adore Azul Plush Twin Mattress

• Medium feel perfect for toddlers and young kids
  

• All-foam construction supports growing bodies through the crib-to-bed transition
  

• CertiPUR-US® certified for peace of mind (no harsh chemicals here)
  

• Model 500319951

» Explore Serta Mattresses

Beautyrest Select Hybrid Palm Springs Twin Mattress

• Ideal for growing kids who need a balance of softness and support
  

• Hybrid design helps minimize motion transfer (great for active sleepers)
  

• Available in twin, full, and queen sizes, so it grows with your child
  

• Model 7008116391010

» Explore Beautyrest Mattresses

Tempur-Pedic TEMPUR-ProAdapt 2.0 Twin Mattress

• Premium pressure relief in a kid-friendly twin size
  

• Advanced cooling technology keeps hot sleepers comfy
  

• Great option for smaller rooms or starter setups
  

• Model 10748130

» Explore Tempur-Pedic Mattresses

 

 

Explore Beds For Big Kids at Bedzzz Express

The switch to a big kid bed is a big step—for them and for you. It’s a little bittersweet, a little exciting, and a whole lot of adjusting. Just remember: Your child doesn’t need the perfect bed, just a safe, supportive one that helps them (and you) sleep soundly.

Visit one of our mattress store locations in Alabama or Georgia, or contact us to find your next full or twin mattress. Check out our top mattress brands for more options.

With our 3-year exchange policy and 2-year extended warranty, you can shop with confidence, knowing you're covered long after your purchase. We also offer other bedding accessories, like mattress toppers and pillows, to enhance your sleep experience further. 

Shop our kid-friendly mattresses at Bedzzz Express today!

Related readings from our blog:

• Is a Box Spring Important?

• Finding Your Perfect Mattress Comfort Level

• What's The Perfect Bed Height For You?

 

FAQ: Common Big Kid Bed Questions

1. When should I transition my toddler to a big kid bed?
Most kids make the switch between 18 months and 3 years, but safety (like climbing out of the crib) is the biggest factor.

2. What if the transition isn’t going well?
It’s okay to pause. Try again in a few weeks, and make sure your child feels secure. You can even start with naps in the new bed first.

3. Is a toddler bed necessary?
Not always. If your child is older or taller, you can go straight to a twin or full-size mattress with a safety rail.

4. What size bed should a 4- or 7-year-old have?
A 4-year-old can do great in a twin bed. By age 7, many families opt for a twin or full mattress to give more room to grow.

5. Should I potty-train before switching beds?
It depends on your child, but many families start the bed transition during or just after potty training. The key is not to make big changes all at once.