With an ingenious trick you can get shrunken laundry into shape in no time. If it's polyester, cashmere or silk, you'll probably bite granite.
But if you have nothing to lose anyway, you can still give it a try. To save the shrunken garment, you need one of these two remedies: either baby shampoo or hair conditioner. They help to relax the contracted fibers again. If this one pass is not enough to return the garment to its original shape,. You can repeat this process several times.