Seed size was one of essential components which affects the soybean performance and
productivity [15,16]. In Indonesia, seed size was divided into three categories: small (< 10 g/100
seeds), medium (10-14 g/100 seeds), and large size (> 14 g/100 seeds). Based on this
classification, a grouping of 150 soybean genotypes showed that seed size was dominated by
large seed size, and reflected by its average (15.80 g/100 seeds). There were 140 large seed
genotypes, seven of medium size, and only three genotypes categorized as small seed size
(Figure 1). The check varieties have large seed size, the largest size was Grobogan (18.71 g/100