The results of this work show that the stability of copper clusters on WX 2 monolayers is mainly driven by the copper-copper interaction, with a clear preference for 3D morphology. Furthermore, the chalcogen species present in the WX 2 monolayer has a negligible effect on adsorption energies, particularly as cluster size increases. The key factor for Cu morphology is its weaker copper-surface energy, compared to its copper-copper interaction energy