15 centimeters. A pig's brain flower is 15 centimeters big. A pig brain flower is 15 centimeters big, pig brain flower as the name implies that the pig's brain. The brain flower is also known as pig brain marrow, the meat is delicate, tender and delicious, eating taste is very good. Pig brain flower has a high nourishing and tonic value, containing calcium, phosphorus, iron more than meat, in addition, pig brain contains vitamin B1, B2 and niacin.