Originally Posted by
alleyoop1
Take a piece of fabric - measure it - wash it and remeasure and you will see how much it will shrink when finished. Also remember batting shrinks too.
Also remember that quilting will 'shrink' the overall size before the finished quilt evers hits water and will additionally, as already mentioned, have an effect on the amount of shrinkage when washed.
May I ask why the shrinkage amount is something you need to know in advance?