Borders can be added to crocheted blankets to add a contrasting color. Ruffle borders are popular for baby blankets. This type of border features scalloped shapes that undulate along the outside edge to resemble ruffles created from lace. Making a border requires the ability to chain and double stitch.
Locate the tail of the blanket. This is the long piece of yarn that is on the corner of the blanket where you started crocheting. Lay the tail against the edge where you will begin adding the border.
Push your hook through the hole in the corner where you started your blanket.
Grab a skein of yarn and locate the end of the skein. Grasp the end between your thumb and index finger so that the yarn runs over the top of the index finger and wraps down the other side of the index finger. Hold the yarn in place with your middle finger.
Slide the hook through the loop on top of your index finger with the hook facing upwards. Twist the loop. Wrap the long end of the yarn up over the hook and to the left. Pull the top loop through the bottom loop to form a slip knot loop.
Place the tail of the slip knot loop against the tail of the blanket and hold both in place.
Wrap the yarn around the top of the hook to the left and pull the top loop through the bottom loop. Repeat this step 12 times to form a chain.
Place the hook through the previously made chain link. Wrap the yarn around the top of the hook to the left and pull the top loop through the previous chain link. Wrap the yarn around the top of the hook again and pull the top loop through the bottom loop. Repeat this step with all of the links in your chain.
Push the hook through the next closest hole of your blanket.
Repeat steps 6, 7 and 8 until you have added a border around the entire outside of the blanket.
Tie a knot in the yarn after the border is completed. Cut off the excess yarn with a pair of scissors.
If you miss a hole in the border, you can pull the hook out and pull on the end of the yarn still connected to the skein to unravel your previous stitches.