What tog duvet for a toddler or child?

Short answer: no duvet under 12 months, a light 3–4.5 tog for toddlers, and 4.5–9 tog for children over three depending on the season.

Checked against UK retailer charts on 18 October 2026.

Duvet tog by age

Dunelm's guidance is that toddlers need a lightweight 3–4.5 tog to avoid overheating, while children over three can use 4.5–9 tog depending on the season, with about 7.5 tog for winter and 2.5–4 tog in summer.

What does tog mean?

Tog stands for Thermal Overall Grade. It measures how well a duvet traps warmth, not how thick it is. A fluffy duvet can have a lower tog than a thinner one with a denser filling.

Duvet sizes

• Cot bed / toddler bed: 120 × 150 cm. Mother&Baby advises against buying a single to grow into: a too-big duvet can tangle a toddler or make them too hot.
• Single bed: 135 × 200 cm (Dunelm's single duvet size).

Is my child too hot or too cold?

Feel the back of their neck or their chest, not their hands and feet, which are often cooler. Hot or clammy means remove a layer or use a lighter duvet.

Room temperature makes the biggest difference. See what to wear to bed by room temperature.