Fins are an important passive means of transferring heat from electronic systems and gadgets. The geometry of fins plays a very important role in their ability to transfer heat. However not much effort has been made in previous studies to select the optimum fin profile for electronic cooling using Multi Criteria Decision Making techniques. Thus in this study, an effort has been made to apply Analytic Hierarchy Process (AHP) with an aim to determine the best longitudinal fin among three different cross sections by satisfying four important conflicting criteria. The decision framework has been constructed by taking help from experts using Delphi technique. Further a sensitivity study has been done to check the robustness of the framework. In four different cases of sensitivity test, the overall ranking of the profiles have been found to be unaltered. As per the opinions received from the experts, the ability to transfer heat has been regarded as the most important criteria by with 51.35 % priority, followed by weight with 28.08 % in the second position. Finally the weights obtained were used in TOPSIS (Technique for order preference by similarity to ideal solution) method to rank the alternatives. While Delphi method fetches important data from experts in the particular field, the AHP converts these linguistic inputs in to numbers and structures the problem hierarchically. Finally TOP-SIS method ranks the alternatives based on their closeness from the ideal solutions. In the current work, with a performance index of 0.5867, triangular fin has secured the best rank followed by step (0.5413) and rectangular profiles (0.4155).