Hi, So many thoughts about ruler's can probably make your brain spin. I have an interest in different rulers but don't really buy the specialty rulers. 6x24 is a must I do use a little 6inch ruler all the time when paper piecing to measure my 1/4 inch, since I don't have a 1/4 inch ruler with that little wedge. I have a 6inch square and would like a 12 inch square. You really don't need to much. Later on if you really want a specialty ruler, go for it but it is not necessary. Any name brand is a good choice and I do mix and match.