Pony Children's Aluminium Knitting Pins. 3.75 mm (18cm) Children 18cm aluminium single point knitting needles £1.90 Quantity: at £1.90 each Add To Basket 5 in stock. Pony Children's Aluminium Knitting Pins - 1 pair - size: 3.75mm Display card hold 1 pair 18cm x 3.75 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.