Things You'll Need
Size C2 crochet hook
Baby weight or fingering yarn, color of your choice
Narrow hair band or 20 inches of narrow elastic (17 to 18 inches for a girl’s hair net)
A hair net does the utilitarian task of keeping your hair out of the way, but can also add vintage flair to your look or meet religious requirements. Rather than buying hair nets, crochet your own and customize them to the size of your head and amount of hair you need to cover. You can also customize each hair net for color, coordinating them to your outfits.
Make a slipknot by creating a small circle with the end of yarn, then pull the tail through the circle. Leave a tail approximately 6 inches long, then put the crochet hook through the loop you created with the tail.
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Crochet five chain stitches and join into a small circle with a slip stitch. Slip your crochet hook through your last stitch, catch your yarn and pull it through the loops of both stitches on your hook. Place a stitch marker into this stitch. You'll use this marker to show you the beginning of each new round.
Crochet four chains, which will be the first double-crochet stitch. Make one double crochet in the same spot as the slip stitch you made for your first round. Chain one. Make two double crochet stitches in the next stitch, or into the center of the circle. Chain one, then continue the pattern of two double crochets, one chain until you complete the round. Join with a slip stitch. You should have 15 double-crochet stitches in this round.
Make four chain stitches, then double crochet in the same spot as your slip stitch and chain one. Crochet one double crochet and a chain stitch in each of the next two stitches. Double crochet twice in the next stitch, chain one, then double crochet stitch in each of the next two stitches. Continue this pattern to the end of round three. Join with a slip stitch. You should have 20 double-crochet stitches in this round.
Begin round four in the same manner. Then make one double crochet and one chain stitch in each of the next three stitches. Double crochet twice, chain one in the next stitch, then chain one, double crochet, chain one in each of the next three stitches. Repeat this pattern to the end of round four and join this round with a slip stitch. You should have 25 double-crochet stitches.
Increase the size of each round until your hair net measures the right diameter for your head. Crochet one double-crochet stitch in each stitch for this round. Join the end of each round with a slip stitch.
Begin to decrease the number of stitches in each round. Joining two or more stitches together is called "decreasing." To join two double crochet stitches together, begin a double crochet and pull the hook through the loops of the next stitch. Instead of finishing this stitch, yarn over and put the hook through the next stitch, complete the double crochet, leaving only one loop on your hook.
Begin the round by making eight double-crochet stitches, then join two double crochets together. Repeat this pattern to the end of the round. Join this round with a slip stitch. On the next round, decrease every five or six stitches. Stop making rounds when the mouth of the net is the size of the person's head. Join the last round with a slip stitch.
Crochet the hair band using one double crochet in each of the stitches around. Cut and fasten your yarn. Weave the end into your work. If you decided to use elastic, you can thread it in and out of the stitches, then sew the ends together with a sewing needle and thread.
You can use a steel crochet hook and crochet thread if you want to make a lightweight hair net. Use a heavier yarn and hook and you will have a slouchy, mesh hat or tam.