Every sewing pattern recommends specific fabric types for a reason. Understanding why — and knowing when you can substitute — is one of the most valuable skills a maker can develop.
Understanding fabric weight
Lightweight fabrics like lawn, voile, and charmeuse drape beautifully but can be slippery to cut. Medium-weight fabrics like quilting cotton, linen, and chambray are the most forgiving and ideal for beginners. Heavy fabrics like denim, canvas, and wool require a stronger needle and more care when pressing.
Woven vs. knit
This is the most important distinction. Woven fabrics have little to no stretch; knit fabrics stretch and recover. Never substitute a knit for a woven (or vice versa) unless the pattern explicitly allows it.
Reading the selvedge
The selvedge edge — the finished edge of the fabric — often contains care instructions and the fabric composition. Always read it before buying.
Prewash everything
Wash and dry your fabric before cutting, exactly as you plan to care for the finished garment. Shrinkage happens, and it is far better to deal with it before you cut your pieces.