2 Aida embroidery fabrics 5.5 stitches/ cm. Aida canvas is a cotton canvas designed for cross stitch. The grid of the canvas is similar to that of a cross stitch chart, which makes it possible to count the stitches and to follow the pattern to be embroidered. The number indicates the number of stitches per cm. The higher this number, the smaller and more refined your pattern will be.