Medium to advanced skills. Knitted in the round. You need yarn (Sandnes garn, Mandarin Petit is Fingering, 4 ply, 14 wpi. I used this doubled. You need 550/600/650/700/800 grams, 1958/2136/2314/2492/2848 meters or 2145/2340/2535/2730/3120 yards) and needles (4,5 mm/US 7). Five sizes: 12 years, 14 years, 16 years or small adult, 18 years or medium adult and large.