What Affects Tension?
Crochet tension is affected by a number of factors: the type and weight of the yarn, the size of the crochet hook, and combinations of both yarn and hook. Individual crocheters will produce slightly different tensions, depending on how they hold the hook and the yarn, and how tightly they pull the stitches.
Why Tension is Important
Written crochet patterns often give different variations for different sizes of the item being worked. In order for crocheters to reproduce the pattern in the desired size, their tension must match the tension given in the pattern. This is particularly important when crocheting garments or the finished garment will not fit.
How to Measure Tension
Most patterns will state the desired tension needed in order to accurately reproduce the pattern. Patterns list "gauge," or the number of rows or stitches that should equal a certain measurement. You can test your own crocheting tension with the tension of the pattern by crocheting a test piece, and then measuring it.
How to Correct Tension
Crochet tension can often be corrected by using either a larger or smaller crochet hook. If your test sample is smaller than the size given in the pattern, your tension is too tight. Move up a hook size and try again. If your test sample comes out too large, your tension is looser than the pattern, and you should try another sample piece with a smaller hook.