These pre printed panels from Olympus Thread Mfg. Co. are called 'hana fukin' with literally means 'flower cloth'. They are printed in grey on indigo blue coloured narrow width traditional sarashi cloth (an easy to stitch traditional Japanese cotton cloth). Each panel is supplied in one piece with a plain area the same size attached, because they are designed to be stitched through both layers and the edges turned in to make a little cloth, but you can stitch the printed layer separately (as I often do).

'Shippō tsunagi' is an ancient pattern of interlocked circles, but is actually easy to stitch as diagonal wavy lines.  This hanafukin has a smaller scale version of the motif, which is an easy design for beginners. Try adding diagonal lines running through the pattern segments for a variation that looks like little leaves! Stitching guide included, in Japanese, but with easy to follow diagrams.
 
Sarashi cloth is quite lightweight compared with other sashiko fabrics, but is very easy to stitch, super absorbent and wears well.  It is one of the fabrics traditionally used for kimono underwear!
 
Finished size approx 13in (33cm) square.
 
Thread requirements - The (1) on the label indicates that to stitch this all in one colour, just one skein of 20m medium sashiko thread is needed. Using a doubled thread would take twice as much.

Marks wash out. NB - the marks have less contrast than my pre printed sashiko panels. The fabric is indigo colour, not natural indigo, so the colour won't run.

Designed and made by Olympus Thread Mfg. Co.in Japan.
 
100% cotton.