The signature of a round company stamp is its curved text — the company name on the top arc, the city or registration number on the bottom arc, and a logo or a keyword like "ATTESTED" in the centre. But fitting text on a curve is a game of geometry.
How the ring works
The text sits in the ring (band) between the outer border and the inner circle. The wider the ring, the larger the font can be — but widening the ring shrinks the centre. The standard balance: keep the inner circle diameter at roughly 55% of the outer.
Character limits by diameter
- 22 mm: ±18 characters on the top arc. Name + city only. Initials instead of a logo.
- 28 mm: ±24 characters per arc — short business names fit comfortably.
- 35 mm: ±30 characters — the most popular size; name, city and centre text all fit.
- 40–50 mm: ±36–44 characters — room for extras like registration numbers and "Govt. Regd."
Rule of thumb: if the name fills more than 78% of the arc, go up a diameter or shorten the text — otherwise the letters start running into each other.
Stars and separators
★ or • separators on the left and right visually divide the top and bottom arcs. They are not just decoration — they tell the reader's eye where the text begins.
Fine curved letters and the laser
In curved text each letter is slightly rotated, so engraving precision matters. This video shows just how finely a laser can cut small lettering into rubber:
▶ See how fine curved lettering survives the engraving process.
Our configurator shows a live preview of curved text on round shapes — type in your own name and see how it looks at every diameter from 22 to 50 mm.
