Rilakkuma Astronaut Space Travel mini letter sets. 

4 writing papers and 4 matching envelopes.

From San-X Japan. 

The size of letter writing paper is about 3.5 x 5 inch.
The size of the matching envelopes is about 2.75 x 4.25 inch.

cute  ●‿●   kawaii  ●‿●   rare  ●‿●   collectible

Awesome for collecting and gift

Perfect for making someone feel special with a love note.
.... for writing my friends/family across the country with cute thinking of you notes
.... for scrapbooking, Playtime, Invitations, Cards,  Journals, Projects, Decorations
.... for birthday gift, party favor
.... for collecting
and many many other things....