Magnetic ruler with magnets on the back to hold your pattern on the pattern binder which is available to buy seperately here: 

https://botanicalyarn.com/products/thread-maple-pattern-binder?_pos=1&_sid=57e8a2056&_ss=r 

Essential in every knitter's toolkit, this lovely Cherry wood ruler fits perfectly in our leather pattern binder. Made in the USA from natural Cherry Wood,�it offers both metric and imperial measurement up to 15cm (6 inches. Featuring the T&M logo at the top, it beautifully completes the a4 folio

Because they are made of all natural wood, the appearance of each may slightly vary.