A French knot is a little tricky but with some practice it can be mastered. Some people find it better to work the knot with the fabric stretched in an embroidery hoop using a chenille or straw needle.
French Knot is also known as French dot, knotted stitch, twisted knot stitch and wound stitch.
The weight of the thread will determine the size of the finished stitch
Bring the needle out through the fabric and holding the thread taut and flat to the fabric with your left thumb. With your right hand twist the needle round the thread twice.
Still holding the thread firmly take the needle back into the fabric one thread away from where the stitching thread emerges from the fabric and insert the needle.
Step 3 The completed french knot
At this point it is sometimes helpful to brush the knot down the shaft of the needle with the nail of your left thumb so that it is sitting firmly on the fabric. Pull the thread through to the back of the fabric. You have completed the knot!