1. Introduction
2. Observations
2.1. Sample Selection
2.2. SINFONI Data Acquisition and Reduction
3. Derived Quantities
3.1. Morphology and Kinematics
3.2. Mass and Star Formation Rate
3.3. Kinematic Classification
4. The Gas Properties in MASSIV Star-Forming Galaxies
5. The Size - Mass - Velocity Relation
5.1. The Size - Mass Relation
5.2. The Size - Velocity Relation
5.3. The Mass - Velocity Relation
6. Discussion and Conclusions