Everyone wants a big chest, thats why on a monday you see everybody hitting chest from all angles and rep ranges.
My advice would be to stop wasting your time on crappy exercises like the pec dec, cable crossovers etc you cannot add detail to a muscle! If i hear the word TONE again I might explode. Read a physiology book on how a muscle actually grows!
Key moves :
Dumbbell or barbell Decline press
Dumbbell or barbell 30% incline press
Push up variations
Thats it! These are the staple movement that will lead to a bigger chest. Progress your lifts with these moves and watch your pecs grow.
Eat.Sleep.recover and grow!!