I bought this product rounded to the next size up (my daughter was barely more than a meter between 1m and 1.10 I chose 1.10). The pants is a little big, especially at the waist (normal), but as this is perfect, it can put even over rain boots (and remove without their shoes).
Essential to walk in the rain and come to completely dry pants. This avoids staying in wet pants several hours, much more comfortable and less likely to get sick. Perfect for going to school for example.
A complete course with a rain jacket for dry up too!