I like and use both the blue tape and the beige tape. Both are helpful and very reasonably priced in the paint section of your local hardware or big box store. When I want to number blocks or rows, I use a small piece of either color according to what I can see best on my fabric. No pin holes. Easier to move or sew around. Don't get stuck and this is important if you are on a blood thinner. I am, also, bad about turning my blocks so if I always put the block number in the upper left hand corner, I have a better chance of sewing them on right to begin with. It isn't fool proof! It still takes some thought...just not as much.