Morphometric measurements are growth indicators in livestock production and they are used sometimes to predict body weight. This research was designed to study the body weight and morphometric traits of crosses between Fulani Ecotype (E) and Isa Brown (B) chickens and their backcrosses to Isa brown (straight – BEB and reciprocal crosses -EBB). A total of 137 crossbred (EB) chickens, 89 Isa brown sired backcrossed (BEB) chickens and 98 F1 sired reciprocal (EBB) chickens were used for the study. Data were taken on body weight (BW), body length (BL), breast girth (BG), keel length (KL), shank length (SL), thigh length (TL) and wing length (WL) on a 4-week interval. The F1 (crossbred) chickens had significantly (P<0.05) superior BW at day-old (37.56g), an advantage over the backcrossed chickens up till the 16th week after which the backcrossed (sired by Isa brown) produced significantly (P<0.05) highest BW (1480.45g). In spite of having the highest significant (P<0.05) BW in crossbred chickens their morphometric traits measurements were lower than the backcrossed by Isa brown in most instances. The backcrossed by Isa brown recorded the highest morphometric growth measurements from day-old to 20-week of age; BL (6.86-29.90cm), BG (8.11-27.69cm), KL (1.00-12.72cm), SL (2.30-11.36cm). A very high positive (P<0.001) correlation was recorded between BW and other variables ranging between 0.67 and 0.99. The result of the study showed that the crossbred had the best performance in BW, while backcrossed by Isa brown performed better in morphometric traits.