This delightful envelope set by illustrator Aiko Fukawa features a cozy windowsill scene with charming black and white cats. Designed to fit postcards or folded A5-size letter paper, it’s perfect for writing, organizing cards, or adding charm to your planner. Set of 5 envelopes (1 design) Size: Western-style No.2 (162×114mm) Made with soft-textured Mino washi paper Ideal for snail mail, postcards, or planner storage Matching “Little Window” letter paper also available A whimsical and heartwarming gift for cat lovers, letter writers, or stationery collectors!