TryStencil (trystencil.org) helps people plan a tattoo before they sit in the chair. Describe your idea in words and get several design options. Then upload a photo of the spot on your skin and see how the design looks in place, adjusting size and position. When you are happy, the stencil maker exports a clean outline at real size. You set the width in centimetres, and the PDF prints at 100% with…