AIDA cloth is used as a universal fabric for cross-stitch work thanks to its clear and concise hole structure and special binding. The arrangement of 4 threads in warp and weft yields tiny windows that vary in size depending on the arrangement. These windows can be adjusted in size, resulting in finer fabric for professionals or coarse AIDA cloth for beginners.
Hardanger cloth is similar to Aida cloth, except that it arranges only 2 threads in each warp and weft block. This creates a fine block of 22 squares per inch. This can be stitched using just one square per cross-stitch, resulting in 22 stitches per inch. Or, it can be stitched over a 2x2 block of squares, resulting in 11 stitches per inch.