Crochet hook
The crochet hook comes in many sizes and materials. Because sizing
is categorized by the diameter of the hook's shaft, a crafter aims
to create stitches of a certain size in order to reach a
particular gauge specified in a given pattern.
Yarn
Skeins and balls of yarn are generally sold with a label that
describes the yarn's weight, length, dye lot, fiber content,
washing instructions, suggested needle size, likely gauge, etc.
Pattern
Crochet is traditionally worked off a written pattern in which
stitches and placement are communicated using textual
abbreviations. To help counter confusion when reading patterns, a
diagramming system using a standard international notation has
come into use.
18 Step-By-Step Crochet Tutorials For Beginners And Beyond