Australian Coin Sizes

Pre-Decimal Coins  

   Coin Denomination

Dia mm

1/2d

25.5

1d

30.8

3d

16

6d

19

1/-

23.5

2/-

28.5

Crown

38.5

 

Pre-Decimal Gold

Coin Denomination

Dia mm

1/2 Sovereign

19

1 Sovereign

21.5

Decimal Coins

    Coin Denomination 

Dia mm    

1c

17.53

2c

21.59

5c

19.41

10c

23.6

20c

28.52

50c Round

31.5

50c Dodecagonal

31.5 (32.5 Widest Points)

$1

25

$2

20.62

$5

38.74

$10

34

$100

25

$200

24

Round Capsule and 2x2 Holder Sizes

If you use a 2X2 Holder with mylar window to house your coin you should ensure the coin is not the same size as the window. Best fit is for the coin to be slightly smaller than the window. For example use a 26mm holder to house a 25mm coin. If the coin is too small the mylar window may ripple making the coin loose in the holder and poorly presented.

We stock Lighthouse and Renniks white 2x2 holders with mylar window for safe storage of your coin. Lighthouse now have MATRIX Black 2x2 holders. MATRIX albums, sheets and holders give your collection a modern fresh look and make your coin the centerpiece on display. 2x2 holders and the MATRIX system also allow for you to write valuable reference information about your coin.

For round capsules it's also best not to have a tight fit. Although the coin will not rotate, it will be difficult to remove and may also damage the edges of the coin. The advantage of round capsules is the capsule can be rotated in most display cases for presentation purposes. 

Adding the capsule to a VOLTERRA case or album with ENCAP sheet will provide not only safe storage but also give your collection a professional look. 

SLABS & QUADRUM Holders

QUADRUM holders and SLABS are becoming very popular with collectors. You may wish to have your coin housed with a slightly firm fit where possible. This will stop the coin from rotating in the holder.

Manufacturers & Publishers

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