Addi Flexiflips - BambooPlease note: We have noticed that the US sizing for the smaller sizes of needles are not consistent with standard metric to US needle size conversion. We recommend buying according to the metric size you need for most accurate sizing. addi FlexiFlips Bamboo have arrived! Cast on to an effortless new method of knitting socks, cuffs, hats, and many of other projects, which are worked in the round with the addi FlexiFlips. These specially designed 9. 5"