Adding soles to your hand-knit slippers will prevent holes from wearing through the knitted fabric and will give them traction. Attach soles to newly-knit slippers or add soles to rescue your favorite pair from wearing out. The process is easy and takes just a short amount of time.
Find suede slipper soles in the appropriate size. Choose a sole large enough to comfortably fit your foot. Make sure the knitted slipper bottom fits into the sole.
Thread a tapestry needle with fingering weight yarn that is the same shade as the yarn you used to knit your slippers. Tie a knot at the end.
Fit the suede sole around your hand-knit slipper.
Sew through the first pre-punched hole on your suede sole, beginning inside the slipper and sewing out.
Pull the thread to tighten the stitch and sew back into the knitted slipper, right above the suede sole's edge.
Sew through the slipper's interior and through the sole's next pre-punched hole.
Repeat the steps above until you have sewn through all the pre-punched holes and the remaining sewing yarn is inside the knitted slipper.
You can find suede slipper bottoms at many yarn stores. You can also purchase them at online yarn stores, like Paradise Fibers (see Resource below).