Vintage mechanical pencil Lead was not sized as metric.  Metric 1.1mm and 1.2mm will not function correctly in all vintage pencils. Fortunately we have acquired a hoard of vintage branded pencil lead still in the vintage containers that fit correctly in vintage mechanical pencils.  The variety is so broad that listing each length, color, hardness and # of leads in each package make it very unweildy to list separtely on this page or to easily transfer simply to a shopping cart.  But the lead shown as ready to be ordered is for the most common  .046"  short medium hardness leads.  If you need other sizes, (.039 thin leads) colors, hardnesses etc, please use our Contact Us  page and tell us what you are looking for and we will explain what options available. Early WAHL-EVERSHARP pencils called for "square" leads...We have those too!