A pre-printed Sashiko sampler is a ready-made fabric piece designed for Sashiko stitching, a traditional Japanese embroidery technique. Sashiko involves creating intricate, repetitive patterns of running stitches on fabric, typically in contrasting thread colors for a decorative effect. A pre-printed Sashiko sampler simplifies the process by providing a pre-drawn design or pattern on the fabric, allowing crafters to follow the lines and create beautiful Sashiko stitches.