The present investigation was carried out during the year of 2014 and 2015 at experimental farm of Division of Fruits and Horticultural Technology, ICAR-IARI, New Delhi to estimate the phenotypic variation and determine the suitability of selected mango genotypes in association mapping studies. Significant variation was observed for the fruit size, fruit shape (fruit length, fruit diameter and shape index) traits in selected genotypes. Highly positive significant Pearson correlation coefficient was exhibited between fruit length, fruit weight and fruit shape index however negative correlation between fruit length and fruit diameter. The average heaviest fruit was recorded in genotype Primor-de-Amoreira and lightest in Bhaduran. Similarly the average longest fruit was measured in genotype Pusa Shresth and shortest in genotype St. Alexandrina however average highest diameter was estimated in genotype Extreema and lowest in Husnara. The fruit shape index was observed maximum in genotypes Iturba and minimum in Extreema. The findings of present study will be surely useful for making future mango breeding strategy and the phenotyping data generated could be utilized for conducting the association mapping studies for these complex traits.