Soft yarn (cotton or bamboo blends are often recommended)
Crochet hook (size appropriate for the yarn)
Start by making a slip knot and chaining the desired number of stitches, depending on the size of the cap you want. For an adult-sized cap, you can start with about 80-90 chains.
Join the last chain to the first chain with a slip stitch to form a circle.
Chain one (this counts as the first single crochet), then single crochet in each chain around the circle. Continue this pattern for each round, creating a spiral without joining at the end of each round. This will eliminate the seam and make the cap more comfortable for the wearer.
Continue crocheting in rounds until the cap reaches the desired height. For a chemo cap, it’s usually best to keep it relatively snug and not too tall.
Once the cap has reached the desired height, fasten off the yarn, leaving a long tail. Cut the yarn and thread the tail through the yarn needle.
Weave the yarn needle in and out of the last round of stitches, pulling tight to close the top of the cap.
To finish, weave in any loose ends using the yarn needle.
You can also customize the chemo cap by adding embellishments like ribbons, flowers, or buttons, but keep in mind that comfort is a priority for the wearer.