Great fit!
I absolutely love this helmet. It is so hard to find a helmet that fits my kids' head properly, however, this fits perfect. The thing that I like most about this helmet is the adjustable back. My three year old and five year old can both wear this helmet, which is great! I wasn't sure if this would fit my five year old, his head measures 55 cm, but the small was a perfect fit. The helmet also has a padded chin strap which makes it comfortable to wear. My three year old often refuses his helmet, but I had no problems with this one.
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