In 1987, a smaller, lighter scallop-edged $1 coin with a similar size and shape to the Hong Kong $2 piece was issued. This coin was produced to replace its bulky predecessor. With the release of its new $2 piece in that year, the Cook Islands became the first modern country to issue a circulating triangular coin, along with a dodecagonal (twelve-sided) $5 piece in equal size and shape to the Australian 50-cent coin. These $1 and $2 were composed of cupro-nickel and the $5 coin was in aluminium bronze.