Things You'll Need
1/8 yard of polar fleece fabric
Ruler or measuring tape
Needle and thread
Iron and ironing board or surface
A hand-knit hat keeps your head warm in cold weather and adds a bit of color on wintry days. But some hats are too big or the yarn is itchy. If this is the case, you can add a polar fleece lining to the hat to make it both warmer and snugger. Polar fleece is an appropriate choice for lining material because it is soft, does not ravel and is readily available at fabric and department stores.
Pull on the fabric to find the direction that it stretches. Polar fleece only stretches in one direction, usually crosswise from selvage to selvage.
Cut a strip of fabric 4 inches wide and 28 to 30 inches long. The strip should stretch along its length.
Try on the knit hat to see where the bottom edge rests on your head.
Wrap the fabric around your head, at the same point as the edge of the knit hat. Hold the fabric so the right side is against your head. The right side is usually fuzzier than the wrong side.
Pin the strip together at the top of your head. Don't stretch the fabric too much, but it should fit snugly.
Sew the strip together at the point of the pin and then cut off the excess fabric, leaving about a 1/2-inch seam allowance.
Press the seam open with a warm iron and turn it right side out.
Turn the hat inside out and slip it inside the ring of fabric, matching the lower edges.
Pin the fabric to the hat at the seam. Use two or three pins if needed to hold the fabric in place securely.
Put both hands inside the hat and stretch it to fit the fabric. Don't stretch the fabric, just the hat.
Pin the fabric to the hat at the point opposite the first pins.
Rotate the hat 45 degrees and repeat the stretching, adding pins at two more points. Now you have four sets of pins, equidistant from each other, that divide the hat into quarters.
Continue to pin the fabric to the hat, adding pins as needed to secure it.
Sew the upper edge of the fabric to the hat with the needle and thread. Use an invisible stitch, such as a slip stitch or hem stitch.
Sew the upper lower edge of the fabric to the hat with an invisible stitch.