The unique Jenerates Knitting Ruler - in centimetres or inches.  The Jenerates Sewing Ruler has been so popular, and a lot of people asked for a knitter's version too.  The ruler starts at zero at both the inside and outside corners, which means you can use it whichever way best lets you see your work.  Plus there's a needle gauge from 2mm to 8mm (0 to 11 on the imperial version) and the ruler fits a standard size tension square exactly.   
 
Let me know if you would like a gift message printed with your purchase - there's a box for that in the checkout.  
 
If you're buying from outside the UK - please buy through Etsy to have the correct tax applied. This should save you paying your local handling charge in addition to any tax.