Pony Children's Aluminium Knitting Pins. 4.5 mm (18cm) Children 18cm aluminium single point knitting needles £1.99 Quantity: at £1.99 each Add To Basket 7 in stock. Pony Children's Aluminium Knitting Pins - 1 pair - size: 4.5 mm Display card hold 1 pair 18cm x 4.5 mm children's knitting needles. Two-colour pairs make learning easy. For ages 6+. Manufactured from solid aluminium and anodized to increase hardness and resist corrosion. These pins have been designed to fit smaller hands, making them suitable for beginner's projects.