Azumino-Momen Hand Dyed Cotton Fabric, Grape Purple linked crosses but you could also use

but you could also use  one

There are several suitable fabrics for this project on this website but here is my suggestion: Cotton fabric for sashiko stitching

Another pattern for your boro and sashiko stitching

one for each day of the year

utilizing traditional embroidery floss to create a variety of textures

Azumino-Momen Hand Dyed Cotton Fabric, Grape Purple linked crosses but you could also useThis 100% cotton fabric is perfect for sashiko, embroidery, visible mending, clothing, soft home furnishings, bags, and throws. This fabric is woven, then hand dyed in small batches in the Azumino district of Japan. During dying it undergoes a treatment which leaves it with a permanent distinctive texture which will show up more when it has been washed once, and does not wash out in future washing. This added texture lends depth to your stitching but