Drawers are always looking for special things and places to draw and extraordinary things to draw on.
This is an envelope, I think it was from 1920, so nearly 100 years ago, and there is still the letter inside. If you read it you are directly in another time and world. It is a bit a sacrilege to sketch on it, but it was before I read the letter.
The size of this envelope is 14×9,5 cm and you could purchase it for 80 €. Or exchange 10 handkerchief doilies for this sketching. Enjoy every moment in your life.