I use plain ole masking tape for marking my measurements on my ruler. One layer won't do much for "butting up" the fabrics, but 3 or so layers will. Just remember to peel it off after you use it becasue the tape can leave a nasty residue.[/quote]
If you use the blue painters tape it won't leave any residue. I keep a roll with my sewing supplies.[/quote]
I bought some painters tape. Since it's peelable or reuseable or whatever the right word is, it tends to not hold very well. All it takes is one tiny corner folded back and the whole marker strip pulls off. Maybe I'm not careful enough about putting it on my ruler. It's still in my sewing basket, but not used as much as the masking tape.