1. What size should I choose for the Wombi?

When manufacturing our Wombis, we deliberately made sure that your favorite sleeping bag can be worn for several months. In order to guarantee the functions of the Wombis optimally, however, selecting the right size is crucial.

Find the right size: Measure your child from the shoulder to the sole of the foot. Now compare with the sizes:

  • Size XS: up to 50cm - about dress size 50/56
  • Size S: 51-60cm - about dress size 62/74
  • Size M: 61-70cm - about dress size 80/86
  • Size L: 71-80cm - about dress size 92/98
  • Size XL: from 81cm - about dress size 98/104

Note that your child should grow out of the baby sleeping bag, not into it !

Should I choose the size a little smaller?

One of the main functions of our Wombis is the transition from swaddling to free sleep. In order to ensure this main function of the Wombi, it is particularly important that the babies have a slight resistance on their hands. So you get the safe and secure feeling you know from mom's baby bump!

We therefore recommend starting with size “XS”, especially for mothers who wrap or swaddle their child.

Adjustment period

By switching to a Wombi, it can also happen in individual cases that a baby needs some time until it feels really comfortable in its new baby sleeping bag. The Wombi should then initially be tried out for short afternoon naps so that the little ones can get used to the new baby sleeping bag.

Only when the reactions of the little ones are positive can the Wombi be tried for the night.

Basically, the little ones need about 10-15 minutes to get used to the new sleepwear. If your baby still doesn't like our sleeping bag at first, then in most cases it helps to try the Wombi again 2-3 weeks later . Because then your baby just wasn't ready to sleep without swaddling.

2. Which model should I choose?

We recommend our winter baby sleeping bag from October or when the room temperature is below 19°C. On the other hand, we recommend our summer baby sleeping bag from April or at a room temperature of 18-20°C.

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The clothing layers shown in our clothing and temperature guide are recommendations only. Ultimately, parents must consider the individual needs of the child and determine the number of layers of clothing based on the temperature of their sleeping environment.

Signs that the baby is too cold

Signs that the child may be too cold and may need to change into one or more layers of clothing or raise the room temperature include:


  1. the child's neck feels cool

  2. the child wakes up frequently and all other factors such as full diapers, hunger, etc. can be ruled out

  3. the child often wakes up early in the morning and cannot get back to sleep

Important: cold hands do NOT indicate that the child is too cold.

Signs that the baby is too warm

Signs that the child may be too warm and may need to remove one or more layers of clothing or lower the room temperature include:


  1. the child has a red head / red cheeks

  2. the child is sweating

  3. the child has a rapid heart rate and / or breathing

3. The right sleeping environment

According to various expert opinions on safe sleep, it is generally important that a child sleeps in a safe sleeping environment. It should only be put to sleep on its back, without additional blankets, pillows, bumpers or cuddly toys. Suitable are, for example, cots, extra beds, cradles or bassinets, which are best placed in the parents' bedroom.

Important to note: covering your head during bedtime can lead to heat build-up. In general, overheating is more dangerous than when the child is too cold. Overheating should therefore be avoided as a matter of urgency.

Still unsure? Contact us!