Shrinking: back in the olden days clothing made of cotton did shrink. Then came "Sanforized" a trademark used for fabric preshrunk by a patented mechanical process so as to minimize later shrinkage. Most all clothing has this.
As far as Goodwill, Salvation Army, etc. These normally go to a Thrift Store and customers pay for used clothing. If your target is the poor, needy, homeless, etc., then there are organizations that I think do a different job in distribution of food, clothing, necessities, shelter. Both would be a charitable deduction.