Your 15 month's sleep space: a safe-sleep guide
Quick answers for this age
Can a 15 month old sleep in their own room?
Yes. Room-sharing guidance covers the first 6 months, and safer-sleep advice covers the first 12 months.
Can a 15 month old have a pillow?
The under-12-months guidance no longer applies. Many families wait until their child moves to a bed, then choose a toddler-sized pillow.
Can a 15 month old sleep with a duvet?
The under-12-months guidance no longer applies. Many families wait until their child moves to a bed, then choose a toddler-sized duvet.
Can a 15 month old have a cot bumper?
No. The Lullaby Trust advises removing cot bumpers: babies can get tangled in the ties and fabric, or climb on them and fall.
Can a 15 month old sleep with a soft toy?
The under-12-months clear-cot guidance no longer applies, and many families introduce a small comforter now.
Can a 15 month old sleep in a sleeping bag?
Yes. Choose the size for your child's weight and height, and a tog for your room temperature.
Can a 15 month old sleep in a cot?
Yes. Lower the base before your baby can sit, kneel or pull up, as the instructions say, and keep the cot clear.
Can a 15 month old sleep in a cot bed?
Yes. Lower the base before your baby can sit, kneel or pull up, as the instructions say, and keep the cot clear.
Can a 15 month old sleep in a toddler bed?
Usually it is early. Most children stay in a cot until they climb out or reach about 18 months to 3 years. A cot bed lets you convert when ready.
Can a 15 month old use a highchair?
Yes. Weaning starts at around 6 months, so a highchair with a harness is useful now.
Can a 15 month old sleep in a car seat?
Short naps while you are travelling are fine, but the NHS says take your baby out of the car seat once you arrive.
Can a 15 month old sleep in a travel cot?
Yes, if it is set up like a cot: rigid frame and base, its own firm mattress, no extra padding, and within the weight limit.
What the guidance says
- Use a firm, flat, waterproof mattress in good condition, with no raised or cushioned edges, that fits the cot or Moses basket with no gaps.
Shop at Baby Kingdom
- Evie Mini Cot Bed - Cashmere
- Vox Bosque Baby Cot Bed
- Obaby Stamford Classic Sleigh Cot Bed in White
- Tutti Bambini Modena 2 Piece Room Set - Oak
Check each product page for its exact dimensions, mattress size, age and weight limits and safety standards.
More advice
Sources
- The Lullaby Trust: Baby mattresses and bedding (accessed 2026-10-21)
General information only, not medical advice. Always follow your product's instructions. If you are worried about your baby, contact your GP, health visitor or 111. In an emergency, call 999.