Know which dimensions are controlled
The chosen diameter describes a circle through the centers of the nails. It does not prescribe the board diameter, nail depth, edge clearance or a safe construction method. The SVG includes millimeter dimensions and the PDF tiles use the same coordinate system.
Number 1 sits at the top. Numbers increase clockwise when looking at the FRONT of the work. Keep that orientation throughout printing, marking and winding; flipping the template or working from the back mirrors the image.
Print a scale check before the full set
Choose A4 or US Letter to match your paper. Select Actual size or 100% and disable any Fit, Shrink or borderless enlargement setting. Measure the 50 mm bar with a physical ruler. If it is wrong, fix the print setting before transferring any nail locations.
The SVG is a single full-size sheet and may be larger than a home printer. An illustration program or print shop can use it, but some applications ignore physical SVG units during import. Check its printed scale just as carefully as the PDF.
Join overlapping pages rather than adding page widths
Each PDF page identifies its row and column. Adjacent pages repeat 10 mm of the template, allowing the circle, numbers and faint registration crosses to align. Trim paper margins where needed and tape the aligned sheets before transferring marks.
The center-to-center spacing reported by the tool is geometry, not a nail recommendation. Check your actual nail heads, board edges and materials. Labels are outside the circle so they do not obscure center marks. Keep the numbered template or a reference photo while winding.