It would be rather unusual these days to come across wool fabric made in narrow strips - the normal width is 54 inches, with some fabrics being 60 inches across, though they tend to be wool mixed with other fibres, or entirely other fibres.

If you cannot find a heavy enough fabric consider using a lighter one doubled. Sewing along the edges can enclose raw edges and hide non kilting selvages.

Anne the Pleater :ootd: