How to shrink clothes within your washer and dryer? using my washer and/or dryer how do I shrink an oversized jacket...

using my washer and/or dryer how do I shrink an oversized jacket that is 80% cotton and 20% polyester. oh and it's pre-shrunk will it be possible?
Answers:    If it's already pre-shrunk it may not work. But try wash it in hot wet and then drying contained by a hot dryer a couple of times It's mostly cotton, so it might keep shrinking. but the hot sea may fade the colour, so you might gain shrinkage but lose colour.
hot water & hot dryer might shrink it rather more. Or you could eat closely of hot dogs & gain weight.