I cut the pattern pieces as noted in the tutorial as they were for my foot size but found that the top piece was too short lengthwise to sew to the base, and i had to add an extra piece to extend round the heel. This was easy enough to do but makes it look a wee bit scruffy on the inside of the heel.
I used a piece of blue suede from an upholstery samples book so i won't slip!
it came to my notice (late last night...hence lack of natural light) that i never showed the other one...i did make a pair, i promise!!