For desirable result of any fixed restoration each small step is equally important, so here i am focusing on most neglected but important step to evaluate the ideal number of layer of application of die spacer to achieve ideal precementation space for proper cementation and fit of complete crown restoration, it also shows the correlation between commercially available die spacer, number layers applied and their effect on precementation space. So in this study i compared Picofit and DFS die spacer which are most widely used commercially available die spacer also compared different layers of die spacer and it is found that to achieve ideal precementation space two layer of both the die spacers are required and are our market products are giving desirable thickness to achieve ideal precementation space.