I would use words such as solid, tough, strong, and unbreakable to describe my form. I chose a guitar that had a protective exterior, that further solidified its form.
This exercise helped in thinking about abstract shapes, and how to describe them without comparison. It allowed me to see familiar shapes in complex forms, as I am now able to break them down into parts I understand the entire form, and how it is made. For example a guitar has the body and the arm. These descriptions alone already connect to the human form.
In form, I am short, not long. I am narrow. I do not have many curves, I am relatively smaller than my environment.