2016 Royal Australian Mint 'Alphabet' Baby Proof Six Coin Set. $2 AlBr 6.6 grams 20.5 mm, $1 ALBr 9.0 grams 25.0 mm, 50c CuNi 15.55 grams 31.51 mm, 20c CuNi 11.3 grams 28.52 mm, 10c CuNi 5.65 grams 23.6 mm, 5c CuNi 2.83 grams 19.41 mm.