Lykke 3.5" Interchangeable Needle Set. Named after the Norwegian word forhappiness,LYKKE Craftscombine high quality materials and thoughtful design to produce beautiful, durable,happy-makingknitting needles. Set contains: 9 pairs of birch wood needles, 3.5" long, (Sizes US 3/3.25mm, 4/3.5mm, US 5/3.75mm, US 6/4mm, US 7/4.5mm, US 8/5mm, US 9/5.5mm, US 10/6mm & US 10.5/6.5mm), 2 cords for 16"(40cm) length, 1 cord for 20"(50cm) length, and 1 cord for 24"(60cm) length, 2 connectors, 4 keys and 8 stoppers.