METRO Blue

"METRO" is a tiny mini wallet named for its pattern design, which evokes a transit map.
Minimal yet equipped with 4 compartments that fit together like a puzzle (card slot, main pocket, fold-out coin pocket, and bill pocket), it achieves a flat form (max. approx. 16.5mm thick) without any snaps or metal fittings.
Storage and construction: Cards can be kept either for quick access or stored together. The coin pocket, which unfolds like a chocolate bar, holds up to around 18 coins, and the bill pocket comfortably holds around 10 bills.
Design background: Inspired by the regularity of the "transit map" that turns a city's transportation network into symbols. By placing points and drawing lines based on storage and function, a three-dimensional structure and beautiful outline emerge from a flat pattern.