The oldest REAL knitting (formed on two sticks by pulling loops through loops) we've got is 'Coptic socks' from Egypt, dating to around the year 1000 CE, done in shades of white and indigo, in stockinette, knit out of cotton
UK, 19th cent. A pair of hand knitted cotton stockings with a lace pattern to knee height (30 cm [13"] from the heel) and stocking stitch tops, ending with three rows of eyelets and few rows of K2P2 rib (61 cm [24"] from the heel). The stockings are knitted in the round, with a seam rib (one purl stitch on alternate rounds) in the middle of the neat leg shaping. The feet are 25.5 and 26.5 cms (10" and 10½") long. Possibly straight common heel.