This is the super soft Riveau reference by Designers Guild in the Emerald colorway.
Its official description is: "A simply ravishing fabric, Riveau is a plain tweedy chenille weave in a wide range of 80 brilliant colourways running the gamut from cool whites, greys and neutrals through to more vibrant signature shades. With a soft and appealing surface texture and handle, this is a perfect fabric for upholstery."
This particular piece measures: 67cmL x 140cmW
60% Cotton 30% Viscose, 10% Polyester