Choose 30 × 20 mm or 40 × 27 mm to suit the collar and engraving.
Pick the shape that suits the pet and the text.
The best tag shape is the one that gives your details enough room and looks right on the collar. DogTag.ie keeps the choice simple with Dog bone, Round and Heart-shaped options.
Updated 30 August 2026Compact and balanced for short, simple text.
A warmer shape for concise contact details.
Choose the shape that fits.
| Shape | Measured size | Best when | Available colours |
|---|---|---|---|
| Dog bone | Small 30 × 20 × 1 mm or large 40 × 27 × 1 mm | You want broader horizontal room or a choice of two sizes | Black, blue, red, orange, green, purple and hot pink |
| Round | 25 × 25 × 1 mm | You prefer a compact disc and can keep both lines concise | Black, blue, red, green, purple and hot pink |
| Heart-shaped | 32 × 35 × 1 mm | You want a softer shape and can keep both lines concise | Black, blue, red, green, purple and hot pink |
Readability first
If your chosen text does not fit, shorten it or choose a more condensed font. The live builder will warn you before payment.
Match the tag to the collar and the text
Dog size alone does not decide the best tag. Compare the physical measurements with the collar, then consider how much information must remain readable. A smaller-looking tag can suit concise text, while a wider shape gives a longer line more room.
- Measure or compare the tag dimensions before ordering.
- Check that the tag will hang freely without overwhelming the collar.
- Choose the layout around essential owner details rather than decoration.
- Use the back when the address and phone number need separate lines.
Dog bone
The Dog bone comes in a 30 × 20 × 1 mm small size and a 40 × 27 × 1 mm large size. Its horizontal centre suits short owner details and phone-number layouts.
- Good for classic dog-tag searches.
- Strong shape recognition.
- Works best with short, bold text.
Round
The 25 × 25 × 1 mm Round is compact and symmetrical. It suits customers who want a clean ID disc and can keep each engraving line concise.
- Best with concise text.
- Balanced on many collars.
- A practical everyday option.
Heart-shaped
The 32 × 35 × 1 mm Heart-shaped tag gives a softer look while still keeping the engraving focused on short, readable contact details.
- Distinctive on the collar.
- Best with concise text.
- A good fit when the shape matters as much as the colour.
Good to know before you order.
Which dog tag shape is easiest to read?
The clearest shape depends on the text length. Dog bone gives a broad horizontal area, while Round and Heart-shaped tags work best with shorter wording.
Which tag should I choose for a small dog?
Compare the listed millimetre dimensions with the dog’s collar rather than relying on a breed label. Round is the most compact overall, while the small Dog bone and Heart-shaped tags can also suit concise text on smaller collars.
Can I engrave the back?
Yes. The builder offers optional reverse engraving so the front can stay simple and the back can carry extra contact details.