This post made me chuckle, I have been going thru all my fabric and gadgets,, My girlfriend and I always have to have the same things, well we are both guilty of buying rulers that we end up not using... I came across two of the same ruler that had not even been taken out of the wrapping. She said you must of really needed that one..... if you bought two.. LOL In answer to your question, no you don't need all those rulers.. I use my 8.5 x 24, 6x 12 and my two square up rulers.