afterthought heel also known as the Turkish or Peasant heel. I've linked to Melody Johnson's tutorial.
This technique works for top down or toe up socks and is totally replaceable if the heel ever shows wear. The way the heel is worked does not alter the number of stitches in the basic tube of the sock. On the other hand, the heel depth is shorter than usual on a short row heel, but if the wearer has a small, delicate heel this won't be a problem. The corners where the heel has been added is a bit ragged and will need a bit of tweaking when everything is done. Do you like to do the Kitchener stitch? This heel is grafted close using the Kitchener stitch, so be forewarned.
My verdict on this technique is a thumbs down. The socks seem to be a bit loose at the front of the ankle. I don't know about you, but I like a tight fitting sock. Like Elvis, these socks have already left the building. A co-worker saw them and expressed an interest in them.
The sock yarn bin seems to be self-leveling: in and out, out and in. But who can refuse the offer of free yarn? I know I can't, so a big "THANK YOU" shout out to Susan for gifting me with these two sock yarns.
For more knitted goodness visit Judy's blog at Patchwork Times.