This Knit Picks Options Interchangeable Knitting Needle Set includes:9 pairs of wood tips, 4-3/4" in length - US sizes 4, 5, 6, 7, 8, 9, 10, 10.5, and 11 (3.5mm, 3.75mm, 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 6.5mm, and 8mm),4 total purple cables, 2 each of 24" and 32" length cables,8 purple end caps,2 cable keys, and9" x 5.5" vinyl case with snap shut closure.Rainbow needles show off waves of color from all across the spectrum for the most colorful version of Knit Picks Options strong and smooth layers of laminated birch.A great starter set for any knitter, beginner or experienced, Knit Picks Options wood needles have sharp, gradually tapered points with just the right amount of grip to make slick yarns manageable, all while giving you the versatility to tackle everything from hats to mittens, sweaters, and more. Mix and match needle tip size with cable length to easily create the circular needle that you need for your next project. Simply attach each needle tip by turning and screwing onto the desired cable length to create your perfect needle (the sizing of the Knit Picks interchangeable cables refer to the total length achieved when the needles tips are attached to the cables). Cable keys are included, which allow you to tighten your needle tips to the cables and ensure a secure fit. Working on multiple projects that call for the same needle size Use the included endcaps to safely store your project as you start the next.