Skull, Crossbones and Hourglass Signet Ring - front view
Skull, Crossbones and Hourglass Signet Ring - 45 degree view

Oxidised Sterling Silver

Skull, Crossbones and Hourglass Signet Ring

£295
Our contemporary take on the classic signet ring, inspired by the flag flown by French pirate Emanuel Wynn in 1700, one of the earliest documented versions of the Jolly Roger. Its skull, crossbones and hourglass warned that time was running out.
Size:

Size

Not sure of your ring size? Message us on WhatsApp and we’ll help you find the right fit.

Get sizing help on WhatsApp
Quantity:
Material925 Sterling Silver
FinishPolished & Oxidised
Dispatch1-2 working days

Size chart

Finding the right ring size matters, particularly with a substantial signet.

Certain Stars rings use UK letter sizing. Because our signets are wider and more substantial than a fine band, the fit may feel slightly different from a narrower ring.

Find your size

  1. For the most accurate result, we recommend having your finger professionally measured by a jeweller or using a physical ring sizing gauge.
  2. Measure the exact finger on which you intend to wear the ring. Finger sizes can differ between hands, so don’t assume that the same finger on each hand will be the same size.
  3. A well fitting ring should feel secure at the base of the finger while still passing comfortably over the knuckle.

Ring size chart

Certain Stars stock sizes: O to U.

UK Size Inside Diameter Finger Circumference
M 16.8 mm 5.22 cm (52.2 mm)
N 17.2 mm 5.35 cm (53.5 mm)
O 17.6 mm 5.47 cm (54.7 mm)
P 18.0 mm 5.60 cm (56.0 mm)
Q 18.4 mm 5.73 cm (57.3 mm)
R 18.8 mm 5.86 cm (58.6 mm)
S 19.2 mm 5.99 cm (59.9 mm)
T 19.5 mm 6.11 cm (61.1 mm)
U 19.9 mm 6.24 cm (62.4 mm)
V 20.3 mm 6.37 cm (63.7 mm)
W 20.7 mm 6.49 cm (64.9 mm)

Other sizes may be available. Please contact us if the size you require isn’t currently shown.

Measure a ring you already own

If you already have a ring that fits the intended finger well, measure its inside diameter and compare it with the chart above.

Measure straight across the widest point of the inside of the ring, from one inside edge to the other. Don’t include the thickness of the metal.

For the best comparison, use a ring that fits the same finger and has a broadly similar width. A fine band can fit differently from a substantial signet.

Measure your finger

You can also measure the circumference of the finger itself.

Use a flexible measuring tape and wrap it comfortably around the point where the ring will sit. Note the circumference and compare it with the chart above. Alternatively, wrap a strip of paper or non stretching ribbon around the finger, mark where the ends meet, lay it flat and measure the length.

Don’t pull it excessively tight, remember that the ring still needs to pass over your knuckle.

Getting the fit right

Finger size can change slightly with temperature and throughout the day. Avoid measuring when your hands are particularly cold or unusually swollen, and measure more than once before ordering.

If your measurement falls between two sizes, we generally recommend choosing the larger size. This can be particularly useful with a more substantial signet.

If you’re unsure, a professional jeweller can measure your finger quickly and accurately.

Measure the finger. Check it twice. Then choose the ring.

Size chart

Finding the right ring size matters, particularly with a substantial signet.

Certain Stars rings use UK letter sizing. Because our signets are wider and more substantial than a fine band, the fit may feel slightly different from a narrower ring.

Find your size

  1. For the most accurate result, we recommend having your finger professionally measured by a jeweller or using a physical ring sizing gauge.
  2. Measure the exact finger on which you intend to wear the ring. Finger sizes can differ between hands, so don’t assume that the same finger on each hand will be the same size.
  3. A well fitting ring should feel secure at the base of the finger while still passing comfortably over the knuckle.

Ring size chart

Certain Stars stock sizes: O to U.

UK Size Inside Diameter Finger Circumference
M 16.8 mm 5.22 cm (52.2 mm)
N 17.2 mm 5.35 cm (53.5 mm)
O 17.6 mm 5.47 cm (54.7 mm)
P 18.0 mm 5.60 cm (56.0 mm)
Q 18.4 mm 5.73 cm (57.3 mm)
R 18.8 mm 5.86 cm (58.6 mm)
S 19.2 mm 5.99 cm (59.9 mm)
T 19.5 mm 6.11 cm (61.1 mm)
U 19.9 mm 6.24 cm (62.4 mm)
V 20.3 mm 6.37 cm (63.7 mm)
W 20.7 mm 6.49 cm (64.9 mm)

Other sizes may be available. Please contact us if the size you require isn’t currently shown.

Measure a ring you already own

If you already have a ring that fits the intended finger well, measure its inside diameter and compare it with the chart above.

Measure straight across the widest point of the inside of the ring, from one inside edge to the other. Don’t include the thickness of the metal.

For the best comparison, use a ring that fits the same finger and has a broadly similar width. A fine band can fit differently from a substantial signet.

Measure your finger

You can also measure the circumference of the finger itself.

Use a flexible measuring tape and wrap it comfortably around the point where the ring will sit. Note the circumference and compare it with the chart above. Alternatively, wrap a strip of paper or non stretching ribbon around the finger, mark where the ends meet, lay it flat and measure the length.

Don’t pull it excessively tight, remember that the ring still needs to pass over your knuckle.

Getting the fit right

Finger size can change slightly with temperature and throughout the day. Avoid measuring when your hands are particularly cold or unusually swollen, and measure more than once before ordering.

If your measurement falls between two sizes, we generally recommend choosing the larger size. This can be particularly useful with a more substantial signet.

If you’re unsure, a professional jeweller can measure your finger quickly and accurately.

Measure the finger. Check it twice. Then choose the ring.

Our contemporary take on the classic signet ring, inspired by the flag flown by French pirate Emanuel Wynn in 1700, one of the earliest documented versions of the Jolly Roger. Its skull, crossbones and hourglass warned that time was running out.

The ring’s enlarged silhouette and stepped bezel create a substantial, architectural form, with the sterling silver emblem cast in relief against a contrasting oxidised background. A distinctive design shaped by maritime history and the coastal character of our Broadstairs home.

  • Sterling silver
  • Certain Stars signature signet shape
  • Raised skull, crossbones and hourglass motif
  • Oxidised recessed detailing
  • Polished silver finish
  • Can be worn on any finger
  • Available in a range of ring sizes
  • Designed in Broadstairs
  • Made in Britain

Complete the look

  • 925 Sterling Silver
  • Designed in Broadstairs
  • Made in the UK
  • 30-Day Returns
  • Fully Tracked Delivery