A knotted stitch is a type of decorative embroidery stitches which form three-dimensional knots on the surface of a textile. 

Common knotted stitches include French knots, coral stitch,  and Pekin knot (also known as Forbidden stitch, Pekin stitch, and seed stitch) which is sometimes also referred as French knot although there is a difference in techniques between these two stitches. 

Raised embroidery or stumpwork has continued to be popular with embroiderers into modern times. In the late nineteenth century and early twentieth century, it was used to embellish women's clothing. 

Today skilled embroiderers carry on the craft in places across the globe using it to adorn objects in ever more creative ways. 

The fabric is first stitched tightly over the wooden frame to remove uneven folds of the fabric. Using a thick cotton thread, the fabric is sewn on to the wooden frame. This does not spoil the grip of the fabric and let's you form intricate patterns over the fabric. 

More often, zari, cotton, and silk threads are used to make Aari work embroideries. Fine patterns of embroidery are one of the main features of Aari work. 

Generally, craftsmen and artisans embellish the Aari embroidery work with sequins, stones and other embellishments to enhance the look of the embroidered patterns.