Advanced skills. Knitted back and forth. You need yarn (La Droguerie Kaleido or Schachenmayr nomotta Cotton Eco, both Sport, 5 ply, 12 wpi. You need 450 grams, 1278 yards or 1170 meters in small, 500 grams, 1420 yards or 1300 meters in medium or 550 grams, 1562 yards or 1430 meters in large) and needles (4 mm/US 6). Both written pattern and chart. Three sizes: small, medium and large to X-large.