Among the charted crafts on this site, only latch hook prints its chart at the size you work. The reason is the mesh: one chart square = one knot = one mesh hole — a 36-square-wide chart on 3.75-mesh canvas is 36 ÷ 3.75, about 9½ inches across, right off the printer. The latch-hook guide carries the full working detail; this is the plan.
The mesh decides the scale, and three mesh sizes cover the craft: 3.3 for chunky yarn, 3.75 as the standard for pre-cut yarn packs, 5 for finer detail. One latch hook (the handle-and-flap tool the craft is named for — the flap holds the yarn while you pull) serves all three. Yarn arrives pre-cut at about 2½ inches a piece, one piece per knot. A marker outlines the design first; the engine's canvas carries 5 squares of unused margin on every side — the Hobbycraft rule — folded to the back when the knots stop.
The whole technique is one sentence, from the guide: fold a piece over the hook below the latch, push it under one horizontal canvas thread, catch both ends, and pull back — the latch does the trapping. All knots face the same direction, so the pile reads as one surface (the Herrschners beginner's rule). Rows work from a bottom corner, upward — finished rows fall out of your way — and the guide's read along a row is what makes busy pictures friendly: Row 3: 8 cream, skip 3, 12 forest — runs and bare squares, dip the next pot, keep going. Check your square-ness against the chart edge every ten rows.
Pre-cut yarn ends the gram math: the shopping list is a head-count of pieces (sorted biggest color first; the guide's worked example — a 36 × 24 fully-knotted checkerboard — counts 864 pieces, about 55 metres of yarn if you cut your own). Pack counts vary by brand, so check the pack — an extra pack over is the craft's own insurance against the pieces that vanish into the sofa.
Trim the pile level, walk the front for missing knots (a one-minute fix anywhere), fold the margin back, overstitch it down in the main color — and comb the pile for the full-finished look. A rug headed for hard floors can borrow the latex-backing schedule from the tufting guide's finish section, unchanged.
Print the chart at working size, one knot a square, and cut some string this week. — the bench crew
