The human brain is 8 times the size of a monkey’s. It weighs about 1, 400 grams.

The size of human brain is 8 times that of a monkey’s which is about 1, 400 gramsweigh.

The human brain, which weighs about 1, 400 grams, is 8 times the size of amonkey’s.

The size of a monkey’s brain is 1, 400 grams, 8 times that of the humanone.

The weight of a monkey’s brain is 1, 400 grams, 8-fold than that of the humanone.