Across the four series of banknotes, the Orchid and Bird notes were noticeably larger than the Ship and Portrait series. The Orchid series had the tallest notes—each denomination was taller than its counterparts in the Bird, Ship, and Portrait series. On the other hand, the Bird series featured the widest notes, with every denomination being at least as wide, if not wider, than those from the other series. From the Ship series onwards, note sizes became visibly smaller. This shift began in the 1980s, when the public gave feedback that wallets were getting smaller and notes needed to fit more easily. At the same time, banks and businesses were increasingly using ATMs, counting machines, and cash registers, which worked more efficiently with smaller, lighter, and more compact notes. By the time the Portrait series was introduced, note sizes were reduced again, though less visibly than the earlier reductions.