Riding breeches - full seat synthetic leather - children's breeches / teenager

Riding breeches - full seat synthetic leather - children's breeches / teenager - I am offering a pair of breeches on behalf of a friend.
The breeches are grey in color and have a full seat made of synthetic leather.
The size is stated as 36-38, but I wear this size myself and do not fit into it. My friend bought them for her 12 year old teenage daughter. I am therefore also offering them as children's breeches.
The waist is a loose 36 cm, the waistband is stretchy with an elastic insert.
Inside leg length approx. 67 cm.
Leg ends with Velcro fastener.

The breeches are as good as new.