I am really glad you said that about the new small ruler
which I have not used. The big 24" would not be useful in cutting small pieces, rather breaking up width of fabric into 3 inch strips which then can be cut into 3'' squares with perhaps the new"baby" size.
I haven't seen them working or figured out why they have some pieces that extend.
My apologies, I should have said 24 inch rolling ruler is for
initial cuts into strips and segments.