This textile is Egyptian, made between the 10th and 15th century. It is 47 cm long and 5 cm wide. It is linen embroidered with tree designs in blue silk and a hem in brown silk. There are also two seams, one flat felled in the textile. It is currently in the Ashmolean Museum.
I have charted up the tree design. It is available in pdf format.
More tunic inspiration!