Tattoo Size Guide — typical sizes by body part, in cm and inches
How big should your tattoo actually be? Typical width ranges by body part, how to measure yourself, printing tips for your Prep Pack, and a quick cm/inch converter.
"How big should this be?" is one of the hardest questions to answer from a screen — a design that looks perfect at 20cm on your laptop can look completely different printed at 6cm on your wrist. This page gives you typical size ranges by body part, a way to measure yourself accurately, and printing tips so the Prep Pack you bring to your artist is true to size.
Typical design width by body part
| Body part | Width (cm) | Width (in) |
|---|---|---|
| Forearm | 6–20 cm | 2.4–7.9 in |
| Wrist | 3–6 cm | 1.2–2.4 in |
| Upper Arm | 8–20 cm | 3.1–7.9 in |
| Shoulder | 8–18 cm | 3.1–7.1 in |
| Chest | 10–25 cm | 3.9–9.8 in |
| Back | 15–35 cm | 5.9–13.8 in |
| Thigh | 10–25 cm | 3.9–9.8 in |
| Ankle / Calf | 5–12 cm | 2.0–4.7 in |
Quick cm ↔ inch converter
cm
in
1 cm = 0.3937 in. This is a plain unit converter — for a size preview calibrated to an actual photo of your body, use the Placement Preview tool's ruler instead.
How to measure your own body part
- Grab a flexible tape measure or a strip of string and a ruler.
- Pick the widest point of the area you want the design to cover — for a forearm, that's usually the mid-forearm, not the wrist.
- Measure the width you actually want the design to span, not the full circumference of the limb.
- Write the number down in cm (most tattoo studios think in cm even in the US) — use the converter below if your artist quoted inches.
- If you already have a design, open the Placement Preview tool and calibrate the ruler against a credit card or coin in your own photo — that gives you a live, to-scale preview instead of just a number.
Printing tips for your Prep Pack
- Print at 100% / actual size — do not let your printer "fit to page" or "shrink to fit." That setting silently rescales the design and defeats the entire point of a real-size stencil.
- Check the print settings dialog for a scale field and confirm it says 100%, not "auto" or "fit."
- Every Prep Pack PDF includes a printed ruler line next to the design — after printing, measure that line with a real ruler. If it doesn't match its labeled length, your printer rescaled the page; fix the scale setting and reprint.
- Use plain white paper, not glossy photo paper — line work photocopies and scans more reliably off matte paper, which matters if your artist wants to trace or scan it.
- If the design is wider than one sheet, the PDF automatically tiles across multiple pages with alignment marks — tape the sheets together at the marks rather than trying to eyeball the alignment.
Put a size to the test
Reading about sizes only gets you so far — try one.