Indigo Interchangeable Set- 13cm/5" TipsMade of strong birch wood, the Lykke Driftwood needles are very smooth and light. With their warm character, the Driftwood needles are easy on the hands and the eyes a true pleasure to work with. All Lykke needles have both metric and US sizes etched on the needles to ensure long term readability. Set contains: 12 pairs of 13 cm 5" needle tips: 3. 5 mm, 3. 75 mm, 4 mm, 4. 5 mm, 5 mm, 5. 5 mm, 6 mm, 6. 5 mm, 8 mm, 9 mm, 10 mm, 12 mm (US 4, 5, 6, 7, 8,