TrimCraft
The Journal
How to Convert Fabric Yardage Between Widths (Without Guessing)
A pattern's yardage chart is only correct for the width it was written for. Here's the ratio that converts it to your actual bolt, and when to add extra for nap and print repeats.
Seam Allowances Explained: Standard, French, and Flat-Felled
A seam allowance isn't just "extra fabric" — how much you need depends entirely on which seam finish you're sewing. Here's what standard, French, and flat-felled seams actually require, and why.
The Continuous Bias Tape Method, Step by Step
Cutting bias strips one at a time and joining the ends is slow and wasteful. The continuous-bias method turns a single square of fabric into one long spiral of tape — here's how it works.
How Much Trim Do You Really Need? Avoiding a Second Trip to the Notions Counter
Running short on ribbon or lace halfway through a project usually means a mismatched dye lot on the second trip. Here's how to measure accurately and buy the right amount the first time.
Pattern Scaling vs Grading: What's the Difference
Enlarging a pattern on a photocopier and grading it between standard sizes are not the same technique, and using the wrong one can quietly wreck a garment's fit. Here's how each actually works.
A Field Guide to Sewing Machine Needles and Thread
The wrong needle or thread for your fabric shows up as skipped stitches, snags, or puckering — usually blamed on the machine. Here's how to match needle, thread, and fabric correctly.
Buttons, Hooks, and the Deeper History of Haberdashery
Long before the modern notions counter, buttons signaled status, lace took months to make by hand, and a haberdasher sold the small things that held an entire wardrobe together. A short history.
How Much Bias Tape a Fabric Square Actually Yields
The continuous-bias method turns a square of fabric into one long spiral of tape, but exactly how long depends on the square, the strip width, and how much waste you budget. Here's the arithmetic, worked through.
Why Bias Strips Are Cut at 45 Degrees
Bias tape isn't cut diagonally by convention — it's cut at exactly 45 degrees because that's the one angle where a woven fabric's grid can shift the most. Here's the mechanism, and why an off-square cut ruins it.
Calculating Fabric Yardage With Nap, Directional Prints, and Pattern Matching
Nap, one-way prints, and repeat matching each break the efficient layout a pattern's base yardage chart assumes — and they don't all cost the same amount extra. Here's each one, worked through separately and combined.
Adding Seam Allowance to a Pattern That Has None
Many Japanese pattern books print pieces at the finished stitching line only, with no seam allowance included — and cutting straight on that line produces an unsewable garment. Here's how to add it correctly.
Estimating Thread for a Project
Running out of thread mid-seam is a small disaster, and how much a project actually uses depends far more on stitch type than most sewists expect. Here's the estimate, and why it's an estimate.