When I was younger, we found a baby hedgehog in our garden, with no mother in sight. As the little one felt threatened by us, it curled up into a ball. We decided to wrap it in a blanket and we took it to a hedgehog shelter. The shelter took care of the baby until it was ready to live on its own.
Specifications: single A6 card (105×148 mm) with matching C6 envelope.