I think I saw a tutorial over at Missouri Star Quilt Co., that she took a layer cake and cut it in half and made a brick quilt. That would be a quick on with bricks (unfinished size) being 5" X 10".
I watched the Fons and Porter episode where Liz made a brick quilt. I did not have instructions so I just cut my flannel bricks at 3 1/2" X 6 1/2". It turned out okay. Hardest part was trying not to have two identical bricks touching.
I imagine if you were using 2 1/2" strips you could just make them whatever length you want.