| Holder Size | Pre-Decimal | Decimal cents | Decimal Dollars |
|---|---|---|---|
| 17.5 mm | threepence | ||
| 20 mm | sixpence, 1/2 sovereign | 1c , 5c | |
| 22.5 mm | sovereign | 2c | $2 |
| 25 mm | shilling | 10c | |
| 27.5 mm | half-penny | $1, $100 | |
| 30 mm | florin | 20c | |
| 32.5 mm | penny | round 50c | |
| 35 mm | 12 sided 50c | $10 | |
| 37.5 mm | |||
| 39.5 mm | crown | $5 |
| Denomination | Diameter |
|---|---|
| Half-Penny |
25.5 mm |
| Penny | 30.8 mm |
| Threepence | 16 mm |
| Sixpence | 19 mm |
| Shilling | 23.5 mm |
| Florin | 28.5 mm |
| Crown | 38.5 mm |
| Half-Sovereign | 19 mm |
| Sovereign | 21.5 mm |
| Denomination | Diameter |
|---|---|
| 1 cent |
17.53 mm |
| 2 cent | 21.59 mm |
| 5 cent | 19.41 mm |
| 10 cent | 23.6 mm |
| 20 cent | 28.52 mm |
| Round 50 cent | 31.5 mm |
| 50 cent | 31.51 mm ** |
| 1 dollar | 25 mm |
| 2 dollar | 20.62 mm |
Australian Coin Sizes
Coin Holders (2x2)
Staple Type and Self-Adhesive
** Please note: The Multi facetted 50c piece is technically 31.51 mm in diameter, however in practice should be treated as 32.5 mm for storage purposes, as the diameter is 32.5 mm from rim to rim at it's widest point.
Information on banknotes, $5, $10, $25, $50, $100, and more exotic coins to come.
Coin holders are an efficient and effective method of storing your coin while protecting it from the elements and manual handling.
Holders are designed to be folded in half around your coin, then the two sides are fixed to each other leaving the coin in between the protective film portal.
This allows your coin to be safely viewed and enjoyed.
Coin holders are available in both staple type and self-adhesive type.
When choosing the right coin holder to suit your coin, allow at least 1mm portal size above the actual coin diameter.
The standard coin holder outside diameter is 50mm x 50mm (2x2), square.
Many presentation and storage solutions are designed around the 2x2 format.
| 1 Shilling | = | 12 Pennies |
| 1 Pound | = | 20 Shillings |
As a word of caution, some of the denominations mentioned above vary in size, so it is worth measuring your coin or note if you are unsure.
TDK
Australian Pre-Decimal Coins
TDK APDC
Resource website
Australian coin sizes.
Coin holder reference guide.
Visit our online store
for great deals on early Australian coins, banknotes, and coin collecting accessories.
It is important that the film used in the holder does not react with your coin over time, as such, always make sure your holder uses a chemically inert film (such as Lighthouse or Renniks).
