Personal boundaries are guidelines, rules or limits you can create to identify appropriate acceptable behaviour. What Are Boundaries? There are different kinds of personal psychological boundaries. It’s important to set clear, appropriate limits on how you relate to others. Types of Personal Boundary Psychological boundaries can be soft, spongy, rigid or flexible. Defining Your Boundaries It’s important to understand our own motivations and responsibilities when developing and evolving healthy boundaries, and to make sure others know and respect those boundaries.