Britannia 1/10 oz 2027 — 3.11 g of silver in the smallest anniversary size
The 1/10 oz Britannia Silver Coin King Charles III 2027 puts 3.11 g of 999 fine silver into a 16.50 mm Royal Mint coin with a 20p face value. Ten coins make one troy ounce, which makes this the size for buying silver in small, easily divisible units. Like the whole 2027 silver range, it carries the 30 privy mark for 30 years of the silver Britannia.
Technical specifications
| Parameter |
Value |
| Issuer |
The Royal Mint (United Kingdom) |
| Metal and fineness |
silver 999/1000 |
| Silver weight |
3.11 g (1/10 troy ounce) |
| Diameter |
16.50 mm |
| Face value |
20p (GBP) |
| Year |
2027 |
| Designers |
obverse: Martin Jennings (Charles III), reverse: Philip Nathan (Britannia) |
| Year feature |
“30” wave privy mark and the number 30 in the background texture |
| Security features |
micro-text, latent image, tincture lines, surface animation |
| Status |
UK legal tender, exempt from UK Capital Gains Tax |
| Mint packaging |
tube of 16, box of 320 |
Why this coin
- The smallest unit of the 2027 silver Britannia at GoldInvest24 — 3.11 g of 999 silver.
- 10 coins = 1 ounce: silver can be sold or passed on in parts without splitting a larger coin.
- All four optical security features of the series fit on 16.50 mm.
- The anniversary 30 mark — the same feature carried by the 2027 Britannia 1 oz.
- A tube of 16 holds 1.6 oz of silver in original mint packaging.
The series at a glance
The silver Britannia has been issued since 1997, and in 999 fineness since 2013. The Royal Mint added optical security features in 2021, and the obverse now shows King Charles III by Martin Jennings. The reverse, with Britannia holding shield, olive branch and trident, is Philip Nathan’s design. The 2027 coin adds the number 30 to the background waves, together with a wave privy mark bearing the same number.
What to check before buying
Of the three 2027 Britannia sizes, this one carries the highest premium per gram of silver, because minting and packing costs fall on only 3.11 g of metal. At 16.50 mm the 30 mark and the micro-text need a loupe, and product photos rarely show them clearly. The coin has a bullion finish — light contact marks from the tube are not a defect.
Why GoldInvest24
GoldInvest24 supplies silver coins from state mints and LBMA-accredited producers, shipped insured and in discreet packaging. You can compare the coin’s price with the current silver price.
1/10 oz against the other 2027 Britannia sizes
| Size |
Silver |
Coins per ounce |
Diameter |
Face value |
| 1 oz |
31.1035 g |
1 |
38.61 mm |
2 GBP |
| 1/4 oz |
7.78 g |
4 |
22 mm |
50p |
| 1/10 oz (this coin) |
3.11 g |
10 |
16.50 mm |
20p |
FAQ — Britannia 1/10 oz 2027
How much silver is in the 2027 Britannia 1/10 oz?
The coin contains 3.11 g of 999 fine silver, one tenth of a troy ounce. It measures 16.50 mm and has a 20p face value.
Does such a small coin have security features?
Yes. The Royal Mint specification for the 1/10 oz lists micro-text, a latent image, tincture lines and surface animation — the same set as the one-ounce coin.
Why does a gram of silver cost more in the 1/10 oz than in the 1 oz?
Striking, inspection and packing cost roughly the same per coin, but in the tenth ounce they are spread over 3.11 g instead of 31.1035 g of silver. In return, the smaller size is more divisible.
How many 1/10 oz coins does a mint tube hold?
A Royal Mint tube holds 16 coins of 1/10 oz, or 1.6 oz of silver, and the mint box holds 320 coins.