If you haven’t used the cash register tapes before it is my opinion too that these are too narrow for borders UNLESS you use them for an inner border and come back with a larger outer border all around. That may be an option for you to think about. I used my 2 1/4 as stripping or sashing between blocks. I have one posted somewhere in Pictures of recycled denim squares set on point, framed with the scrappy 2 1/4. It’s a favorite throw.