This Card set is by totoganashi, a popular Japanese illustrator who creates art paintings and textile and paper works based on her original watercolor illustrations.
The square card set has a design of "blue night," which is inspired by the image of a holy night.
There are 4 patterns in the set, and the backs of the cards are plain white.
The cards can be used not only as message cards, but also framed and displayed in a room.

-Card:
4 cards (4 pattern x 1 card)
100mm x 100mm
-Package envelope:
125 mm x 124 mm