The double crochet (dc) stitch is double the height of the single crochet stitch (sc). It is used to build height in a crochet piece by adding a few more yarn overs.
How to double-crochet
(step-by-step with photos)
Step 1
Start with a yarn over (yo), moving the hook under the working yarn and wrapping it around the hook.
Step 2
Insert the hook under the next stitch or v.
Step 3
Yarn over then pull the yarn through the next stitch or v.
Step 4
There should be three loops left on the hook.
Step 5
Yarn over then pull the yarn through the first two loops.
Step 6
There should be two loops left on the hook.
Step 7
Yarn over then pull the yarn through the first two loops.
Step 8
Yarn over. Pull the yarn through the last two loops on the hook.