These Mini Envelopes (Pochi Bukuro) are designed by Seitosha, a Japanese design company that makes products from hand-drawn designs.
The name of this design, "Minamo," means "the surface of the water reflecting the sunlight.

-Size: 6.4cm x 9.7cm (2.52" x 3.82")
-5 envelopes

星燈社さんのポチ袋。
この図案の「みなも」は「きらきらと陽光が反射するみなも」を表しているそうです。

横6.4×縦9.7cm 1セット同柄 5枚入り