Customise your journal or snail mail post with this mail-themed washi tape from Everyday Explorers Co. Each prompt is perforated on all sides to look like a postage stamp and can be easily pulled apart.
 
Prompts include:
open here
happy mail day!
oh yay mail!
do not bend
wish you were here
send more mail
special delivery!
write on!
happy mail day
sent with love