This study investigates the hydrodynamic performance of the TECCO CELL system through physical modelling. This innovative coastal defence system was applied in Beesands (southwest England) in 2016 and delivered satisfactory erosion mitigation since installation. We made 1/10 scaled models of the steel-wire mesh pebble/rock cells in the laboratory and studied the interaction between the cells and incident waves by measuring various hydrodynamic performance criteria such as wave runup, transmission, and reflection. And compared its performance with the conventional rock armour defence model. Based on our findings, we make recommendations on maximizing the hydrodynamic performance of steel-wire mesh pebble/rock cell revetments. Moreover, this research aims to develop a dimensioning system to be able to scale and utilize the TECCO CELL defence in different wave conditions through calculations, lab tests and a case study at Beesands, United Kingdom.