First of all, remove the existing hem stitches of your yoga pant, using a large needle or a seam ripper. Make sure not to rip the fabric of the pant while taking away the stitching.
Take a measuring tape or a large scale and measure the new hem from the floor. Now, carefully measure the new hem with the help of a straight pin.
Bring a sharp pair of scissors into play and use it to cut the pant’s fabric about ¾ -inch right below the new hem.
Now pick a threaded needle and stitch along the edge of the cut fabric, using a zigzag stitching style in order to prevent fraying and hold up the fabric.
Turn the yoga pant inside out and gently fold up the hem to the pinned marker. Now, use some straight sharp fabric pins to pin up the hem.
Stitch up the hem ¼-inch beneath the finishes edge of the pant, using a short zigzag stretch stitch or a built in stretch stitch. Remove the applied straight pins as they are passed and clip thread ends properly.