A lot of really great ideas! I usually use regular mailing labels and i can get about 4 to 6 blocks from one single label. So they dont stick forever, i just stick them on the leg of my jeans to get a little lint on the back before applying to my quilt blocks. I dont really like the idea of putting something sticky on my fabric, but sometimes ya gotta do what ya gotta do! I dont leave the labels on for an extended period of time because of the adhesive issue on fabric. Knowing that i dont want the labels on the blocks for very long also makes me get the piecing finished asap - so it forces me to finish piecing.
i really, really, really like the Painters tape idea! Next time i am out and about i will see what widths are available for rolls. Hoping for something more on the order of less than 2” wide - that would be perfect!
You all have such great ideas and really get me outta my box! 😊