What is a Dutch heel?
There are many different sock heels and their variations, but the Square or Dutch heel is my personal favorite. It is basically what it sounds like: a square heel with a rectangular cap. It has a very nice fit and is really easy to work – there is literally no counting to be done after the setup!
What part of a sock is the gusset?
Gusset/Instep: This is the part of the sock that runs from the heel into the main part of the foot. It can normally be seen as a triangular shaped area where shaping either side of the foot decreases the number of stitches after a heel flap.