The breasts are mainly composed of fat and glands, and without cosmetic surgery it is impossible to make them considerably larger. However, underneath your breasts lies a layer of muscle called the pectorals, which can be made larger with exercise, giving your breast a larger, firmer appearance. Making your breasts bigger and firmer with exercise takes longer than cosmetic surgery, but it's a cheaper and safer alternative.
To perform pushups, which will develop your pectorals, get on all fours on the floor or an exercise mat. Place your hands a little wider than your shoulders. Tuck your toes under and lift your knees off the floor. Lower your hips so that they are in line with your heels to your shoulders and so that your body looks like a plank when viewed from the side. Contract the muscles in your arms, chest, abdomen and legs, and slowly begin to bend your elbows out to the side, lowering your body in one piece down toward the floor. Stop when your chest is about an inch from the floor, and push yourself back up to the starting position. Repeat as many times as you can without losing proper form. If this is too challenging, keep your knees on the floor but maintain the straight line of your torso.
You'll need two dumbbells and a weight bench for this exercise. Lie on your back with your head supported by the weight bench. Hold a dumbbell in each hand, and raise them over your chest, with your arms slightly bent. Contract the muscles in your chest and slowly begin to move your arms apart until they come parallel with the floor. Keeping the muscles in your chest contracted, bring your arms back together over your chest without bending your elbows further or arching your lower back. Repeat 12 to 15 times.
You need a weight bench, or another bench of similar height, for this exercise. Stand with your back to the weight bench and about 1 foot in front of it. Squat down and put the heels of your palms on the edge of the bench, and curl your fingers around the edge, getting a good grip. Walk your feet out until they are directly underneath your knees. Your arms should be straight. Begin to bend your elbows, lowering your buttocks toward the floor. When your buttocks are about an inch from the floor, push back up, straightening your arms. Repeat 12 to 15 times.
You will need two dumbbells and a weight bench for this exercise. Lie on the bench on your back with the dumbbells in the air over your chest and your arms straight. Your palms should be facing the wall in front of you so that the dumbbells are end to end. Begin to bend your elbows out to the side, bring them to right angles. Your upper arms will be parallel to the ground and your elbows will be at the same level as your shoulders. Contract your chest muscles, and push the dumbbells back up to the starting position. Repeat 12 to 15 times.