Submerged artificial reefs are the coastal structures that protect the coastline in an effective way with minimum damage to the coastal environment and enhance the marine ecology in the region. The artificial reefs (AR) commonly used come in various shapes and sizes, which offer different levels of coastal protection and serve various recreational purposes. This paper discusses a physical model study that provides insight into comparing the performance of circular pipe-shaped submerged artificial reef structures made of two different diameter pipes, tested under different wave conditions in a wave flume. The inference of the study shows that the larger diameter AR shows comparatively less wave transmission compared to the smaller diameter AR. However, the wave transmission reduction is considerably less with the maximum change noted to be under 26%.