Past the heel and into the instep. Used a band heel, and I like the way it works with the self-striping yarn. However, am nibbling my fingernails and wondering if I'll have enough yarn to get a sock out of each skein without having to patch at the toes—or having big scraps left over. I found a reverse Dutch Heel for toe-up socks, so after I complete this pair, I think I'll make the self-striped socks from the toe up to avoid this situation.
Yes, I know you can short-row heels and those look good with the self-striping yarn, too. However, they don't fit my feet very well. I have tall heels, and NEED that flap to keep my socks from feeling like they're going to be sucked down into my shoes. Both the band heel (which would be great to put some patterning on, methinks) and the reverse Dutch heel (would that be a Hctud Heel?) have the heel flap thing going.