Handy-Dandy Vintage Needle Conversion Chart
I've been noticing people all over the Intercrappinet working with vintage patterns and there always seems to be some question about converting needle sizes. Question no more, for I have constructed in my lowly apartment a Wonderous Conversion Chart from scrap wood, duct tape, and drywall screws. The paint has finally dried so it's all ready to use, but watch out for the splinters.
The Old UK numbers seem to correspond to the Victorian knitting patterns I've posted since all those are English. I have no idea why I don't have any US Victorian stuff.
So now you've got no excuse not to go knit something older than your grandma, Grandma!