Stencils for arms and legs: measuring the circumference and compensating the curve
Reviewed on October 16, 2026
Paper is flat and an arm isn’t. What measures ten centimetres on paper looks quite a bit narrower from the front once it’s wrapped around an arm.
Why it narrows
Seen from the front, a point at a distance s from the centre along the skin appears at r·sin(s/r) from the centre, where r is the limb’s radius. The further the design wraps, the more the sides are compressed.
How to measure
With a tape measure, go round the limb exactly where the tattoo will go. On a forearm or calf measure above and below the design: these areas taper and the circumference changes.
What the compensation does
It stretches the stencil sideways just enough so that, once wrapped, each point lands where it should appear from the front. On tapered areas the paper unrolls like a fan and the rows become arcs.
Limits
From the front you never see more than the limb’s diameter. If a design wraps more than about 60–75° each side, the sides stretch a lot and only look right from the front: consider making it smaller or splitting it.