My First Enigmatic box

“Sign here,” said the postman.
Meant to bin the email but didn’t. Just became intrigued.
A ten inch cube wrapped in newspaper. Recycling, terrific! Address in copperplate Parker blue. Classy!
Doesn’t rattle? No weight! I wonder...
I’ll look at it over a cuppa. Perhaps, a digestive as well.
Now, where’s the paper knife?
Nice! Perfectly folded edges. Remove the newspaper and...
More newspaper wrapping? With a note, same copperplate hand, on torn notepaper:
The contents of this box are only guaranteed enigmatic; provided the container remains unopened.
The Enigmatic Box Company©
Hmm! Should I have ordered the fifteen inch box?