This textile is an even weave linen, embroidered in dark blue cotton. It is 12.5 cm high and 11.5 cm wide and thought to have been made between the 10th and 15th centuries. It is currently in the Ashmolean Museum.
I have charted up the design, as well as attempt to embroider it. The chart is available for download in pdf format-
Let me know how it works out!