The study on the changes in fruit seed growth and development of eight ber cultivars viz., Chhuhara, Chinese, Kalagola, Nazuk, Sanaur-2, Sanaur-4, Umran and ZG-2 was conducted at Horticulture Research Centre, Patharchatta, G. B. Pant University of Agriculture & Technology, Pantnagar, U.S. Nagar, Uttarakhand, India during the season of 2017-18 and 2018-19. The experiment was laid out in two factors Randomized Block Design (RBD) with three replications. Sampling dates and cultivars were considered as the treatments. There were 11 sampling dates commences at 28 days after full bloom (DAFB) to 168 DAFB and observations were taken at biweekly interval. Stone length, diameter, weight and flesh: stone ratio of fruit of different ber cultivars have been found to be increased with advancement of growth and development period. The maximum (2.46 cm) stone length was recorded in Umran and the minimum (1.79 cm) in Chhuhara at 56 DAFB. The maximum (0.80 cm) stone diameter was recorded in ZG-2 and the minimum (0.55 cm) in Nazuk at 56 DAFB. The maximum (1.26 g) stone weight was recorded in Umran and the minimum (0.53 g) in Kalagola and ZG-2 at 56 DAFB. The maximum (4.71) flesh: stone ratio was recorded in ZG-2 and the minimum (1.14) in Chinese at 56 DAFB.