Australian Coin Sizes

Pre-Decimal Coins
Coin DenominationDiameter mm
1/2d25.5
1d30.8
3d16
6d19
1/-23.5
2/-28.5
Crown38.5
Decimal Coins
Coin DenominationDiameter mm
1c17.53
2c21.59
5c19.41
1023.6
2028.52
50c Round31.5
50c Dodecagonal31.5 (32.5 Widest Points)
$125
$220.62
$538.74
$1034
$10025
$20024