Grobag Guide

Choosing a size

An ideal time to start using a Grobag baby sleep bag is when your baby weighs more than 8.8 lbs (0-6 mths size). Your child's head should not be able to pass through the neck hole when the Grobag is fastened; otherwise the Grobag is too big. Remember to check the weight of your child.

Please remember that these are recommendations only as all babies are different.

Approximate child age Minimum child weight Maximum child length
0-6 months 4kg / 8lbs 13oz 68cm / 27"
6-18 months 8.1kg / 18lb 86cm / 34"
18-36 months 11.4kg / 25lb 98cm / 39"
3-6 years 53.5cm chest 116cm / 46"
6-10 years 58cm chest 140cm / 55"

Why don't Grobags have sleeves?

We believe that Baby Sleep Bags should be sleeveless to aid heat loss and air circulation. (Babies sleeping under traditional blankets rarely sleep with their arms inside). The new British Standard also stipulates that Baby Sleep Bags should be "without sleeves or hoods". In cooler weather, we recommend long-sleeve bodysuits, in addition to a long-sleeved pyjama top, pyjamas or a sleepsuit.

What are Togs?

A tog measurement is a European warmth rating: the higher the tog, the warmer the product. Grobag baby sleep bags are available in four tog ratings.

3.5 Tog

Cold temperatures, for cold rooms

16°C (61°F) and below

2.5 Tog

All year round, for standard rooms

16-20°C (61-68°F)

1.0 Tog

Summer and daytime naps, warmer weather and in rooms

21-23°C (69-74°F)

0.5 Tog

Holiday and heatwaves, hot weather and very warm rooms

24-27°C (75-81°F)

What Tog should I use?

A number of factors determine the tog rating of the baby sleep bag that should be used. These include the number of clothes your baby is wearing, the temperature of their bedroom and your baby's health.

Nursery Temperature Bed Time
24-27°C (75-81°F)
0.5 +
23°C (74°F)
1.0 +
21°C (69°F)
1.0 +
20°C (68°F)
2.5 +
1.0 + +
Under 18°C (65°F)
2.5 +
Under 16°C (61°F)
2.5 + +
2.5 + +
3.5 +
Under 14°C (57°F)
3.5 + +
3.5 + +

Guide Key


Sleeveless cotton body suit

Short-sleeved cotton body suit

Long-sleeved cotton body suit

Pyjama Top


Styling Features

Grobags come in a range of styles to suit your needs

Side Zip

Side zips have double poppers on the shoulders and under-arm poppers for when your baby is small. They open out flat for easy night time nappy changes.

Front Zip

Front zips have fixed shoulders and are great if your child moves around a lot. This is ideal for toddlers.

Travel Grobag

Travel Grobags are similar to normal Grobags with the added feature of a two way front zip and a back vent so it can easily be used with a 5 point harness in car seats or pushchairs.

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