Test slipper sock in worsted weight paton classic wool merino old gold. Did medium size on us#5 and the cuff in waffle stitch increasing needle size for a wide calf US#5 ankle US #6 after 4 rows and after 14 rows us#8 BOFF us#10.75 simple bind off. The fabric is very dense and this helped loosen it up. Not the nicest yarn for socks but I had some. It fits perfectly. my gauge 6 sts/in us #5. Very easy todo. The problem I have is the tensioning on t he kitchener. I did fix it but had to redo my 1st heel.