Yardage / Meterage
Yardage (or meterage) is the length of yarn in a skein or per 100 grams. This measurement is crucial when calculating yarn amount for substitutions.
Explanation
Yardage (or meterage) tells you how many meters or yards of yarn you get in a skein or per 100 grams. This is the most important factor when substituting yarn in a pattern. Two yarns may weigh the same but have completely different lengths. A thin yarn has a longer yardage than a thick yarn at the same weight. When substituting yarn, you must calculate how many skeins you need based on total length, not number of grams.