Introducing the one and only needle gauge designed specifically for addi Rocket [squared] needles! Made in the USA by Katrinkles and laser cut from locally sourced birch, each gauge provides a lightweight and durable solution for your sizing needs. Approximate size: 2.5″ by 2.5″. Each gauge includes a stainless steel ball chain. Please note that the appearance of each gauge may slightly vary due to the natural material.