How to Choose the Right Crib Cushion Size for Your Baby's Cot

Crib cushion sizing is one of those things that seems obvious until you order the wrong one and it either gaps or bunches up around the inside of your cot. Getting the size right isn't complicated — but it does require a few minutes with a tape measure before you buy.

Here's everything you need to know to get it right the first time.

Why Size Matters for Safety (Not Just Aesthetics)

A crib cushion that's the wrong length will either leave gaps (which defeats the purpose of preventing limb entrapment) or bunch up (which creates uneven surfaces and potential pressure points). Either way, it's not just inconvenient — it compromises the product's safety function.

The goal is a snug fit: the cushion should sit flush against the inside of the cot slats, with no gaps and no excess bunching.

Step 1: Measure Your Cot's Inner Perimeter

Standard Australian cots vary more than you might expect. Before buying, measure:

• The internal length of your cot (the long sides)
• The internal width (the short sides)
• The internal height of the slat area (how tall the bumper needs to be to cover the slat zone)

Most Australian standard cots have internal dimensions around 130×70cm, but this varies by brand. Some European-style cots are slightly different.

Step 2: Decide Which Sides to Cover

You don't always need to cover all four sides. Many parents choose to cover just the two long sides — this is where limbs are most likely to slip through, as babies tend to lie along the length of the cot. The short ends are less commonly needed.

If you're covering all four sides, add the internal perimeter (2 × length + 2 × width). If just the long sides, double the internal length.

Understanding the 240×28cm Dimension

The Premium Baby Crib Cushion - Cushy™ at Baby Bubble comes in 240×28cm. Here's what that means in practice:

• 240cm length — runs all the way around a standard cot (typically 2 × ~130cm sides + 2 × ~70cm ends, which totals approximately 400cm for full perimeter — so a 240cm cushion covers the two long sides and part of the short sides)
• 28cm height — tall enough to cover the slat zone for most Australian cots, which typically have slat areas of 22–26cm from mattress level

For most standard Australian cots, 240×28cm is the right dimensions for two long sides plus some of the short ends. It's the most practical combination for limb entrapment prevention.

Step 3: Check Your Cot's Slat Gap

Australian Standard AS/NZS 2172 requires slat gaps of no more than 95mm (9.5cm). If your cot meets this standard, limb entrapment through the slats is primarily an arm/ankle issue, not a head issue. The cushion height needs to cover from mattress level to where arms and legs can reach — the 28cm height on the Cushy™ covers this zone for the typical 4–12 month range.

Step 4: Check the Attachment Method

How the cushion attaches to the cot matters for fit and safety. Options include:

• Tie-on strings — classic but need to be trimmed short (excess string is a hazard)
• Velcro tabs — easier to adjust but can wear out
• Fitted/wrap design — slides over the slats like a sleeve; most secure and no loose attachments

Regardless of attachment type, check that the cushion is secured firmly enough that your baby can't pull it off or dislodge it by pushing against it.

Quick Sizing Reference for Australian Cots

Cot Type	Internal Dimensions (approx)	Recommended Cushion Length
Standard Australian cot	130×70cm	240cm (2 long + partial short sides)
Compact / Travel cot	100×60cm	200cm or custom
Bassinet (oval)	Varies significantly	Measure and buy specifically

The Cushy™ in Gray — Why This Colourway Is Consistently Popular

The Gray variant of the Cushy™ is one of Baby Bubble's steady sellers for a simple reason: gray works in virtually any nursery without committing to a pink or blue theme. It's particularly popular in Scandi-style nurseries and in gender-neutral setups. And practically speaking, gray doesn't show the minor dust and lint that lighter colours do.

Buy Right the First Time

Measure twice, buy once. With the 240×28cm Cushy™ fitting the vast majority of standard Australian cots, most parents will find it works without any modification. If you're unsure, contact Baby Bubble before ordering — they're happy to help match the cushion to your specific cot.

→ Shop the Premium Baby Crib Cushion - Cushy™ in Gray at Baby Bubble