Stamp it on back to the envelope.
This Waxseal-like stamp is very handy and easy,
but it adds a nice retro touch to your letter.
It will work on all kinds of envelopes.
Also very good on wrapping papers!
Recommended on craft paper with red ink!
(Width:30mm Height:30mm Depth:24mm)
King "Dali" envelope seal
Material: Wood handle, Rubber stamp