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To evaluate the dimensional accuracy of stone models obtained by using three different putty wash impression techniques for an elastomeric impression material. Material and method: A total of 45 impressions were made by three routinely used putty wash impression techniques by using an addition silicone elastomeric impression material. Further, three groups of stone models were made consisting 15 models each using one step, two step with polythene spacer and two step with 2mm relief in a custom-made metal mould. The dimensional accuracy of the retrieved stone models were measured by using digital travelling microscope at inter-abutment and intraabutment distance. One-way ANOVA was used to compare the differences among the three putty-wash impression techniques.Results: Significant differences were found among the three impression techniques for all heights and interabutment dimensions (P<.001) Conclusion: Within the limitations of this study, it was concluded that two step putty wash impression technique with 2mm relief should be the impression of choice.