I also buy the kawaii envelopes from Asian gift shops and Sanrio!
Those envelopes are Wish Me Mell from Sanrio Original line. I think he looks so cute!
This is Mashirmaro from South Korea. Mashirmaro is a fatty rabbit who always has an enemy who wants to arrest him for a reason. Anyways, here are images of fronts and backs of envelopes.
I think that is all I have these envelopes. How do you like them?