Heirloom Natural with Scrim is made with Natural cotton but has a thin scrim (stabilizer) needle punched into the cotton. This scrim provides superior strength over cotton alone, and prevents the batting from stretching and distorting. Shrinkage of 3-5%. Outer case size: 24. Dimensions of Piece: 36in x 45in (91.4 x 114.3cm). Do not pre-wash. Gentle hand wash after.