I have never used phone book paper either. Muslin is what I use. i suppose you could use notebook paper. I am assuming that you plan to remove all the paper when you are done?
If you are making a "string" type quilt, your strips do not have to be the same width. Different widths will add interest to the blocks. I don't think they all have to be straight either. I'm also making that assumption that a 2"strip will be 2" all the way. I have made some sting blocks using a wedge shape. As in maybe the strip is 2" at one end but narrows to 1.5" at the other.
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My newest Grandson, Caleb Austin, was born May 29th. I am now Grandma to 4 precious babies. I am so blessed!!!!