Things You'll Need
Flannel fabric to match
Pattern for spats
Needle and thread
Footed pajamas keep your feet warm and give you a nonslip surface for walking. Unfortunately, you cannot always find these pajamas once you reach adulthood. And while you can find patterns in the fabric stores, not everyone has the time to sew pajamas from scratch. Instead, to minimize your sewing time, you can simply sew on a pair of pajama feet to your already made, comfortable pajamas.
Select flannel fabric that is a good match to your flannel pajamas so the feet will look good. Solid-color pajamas may be easier to find a match for than patterned pajamas. If your pajamas have a pattern, consider finding some solid flannel that matches the predominant color.
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Using slippers for your foot pattern, cut out the soles of your pajama feet from the gripper fabric. You do not need to have much curve along the instep of the soles, so simplify your sole shape by making it more oval. Make the sole slightly larger than the slipper. This extra material is your seam allowance. In general, a seam allowance is 1/2 inch to 5/8 inch. Whatever allowance you use, be consistent.
Modify the spat pattern. The pattern will give you the basic shape, but it will be too short to cover your whole foot and will not be as wide as your pajamas' legs. Therefore, you will need to widen the top of the spat pattern to fit the pajama legs. Remember, a spat has two sides, so each side just needs to be wide enough to go around half the pajama leg. But cut it wider, as you will need a seam allowance on both sides.
Extend the two angled sides of the spat pattern. The back side must be long enough to reach the bottom of your heel. (Be sure to add in a seam allowance.) The front, sloped side of the spat must be long enough to reach the toe of your sole pattern and completely cover your foot. Measure across the top of your foot from where the pajama leg hangs, and add in a seam allowance. The curve of the spat is the part that will go around the soles. The curve should match that of your soles, which is another reason for simplifying the sole to an oval shape. Once again, add a seam allowance around the curved edge.
Cut the modified spat out of the flannel fabric. You'll have four pieces, two for each foot.
Sew the pieces of the first modified spat with the right sides together. Use pins to hold the pieces together while sewing. This should fit over your foot easily and have two openings. At the neck, it should be the same size as the bottom of your pajama legs. The opening at the base of the spat should match the size of your oval gripper sole. Sew the second spat.
Leave the spat inside out and pin a sole onto the bottom of one of the modified spats, right sides together. Sew it together with the gripper side inside. Sew all the way around the sole, then trim the seam close. When you turn the spat right-side out, it should look like a little shoe. This is your pajama foot. Repeat for the second spat.
Turn the pajamas inside out. Put one foot inside the pant leg. From inside the pajamas, you should have the right sides of the pajamas and the foot together. Carefully pin the foot so that its toe will be right off the front crease of the pajama leg. Sew around the bottom of the pajama leg. Repeat for the second pajama leg.
Before attaching a foot, you can rip open the hem of the pajama leg. This will add length to your pajama foot and will also make the seam around your ankle less bulky. If it adds too much length, you could always cut off some of the fabric, but most likely the extra length will allow your foot and ankle more movement.
If you don't use gripper fabric, it is easy to slip and be injured in a fall when wearing the pajamas.