I have a lot of rulers that I use, have picked up as needed, or received as gifts... The ones that are definitely used everyday, my I would hate to live without... Are- the 6" X 24", 6 1/2" square, my "flying geese" ruler. Those 3 are used A Lot! Others I use often, picked up along the way, happy to have are the different sized squares. (2 1/2", 4 1/2", 12 1/2", 15", 16 1/2", 20") I still want a 9 1/2".... And then there are the triangle and wedge rulers- as I found projects needing them I picked them up, they are not used as often, but when I need them its nice to have them