1. Creative Grids Stripology ruler.
2. O'Lipfa Lip Edge Ruler 4"X36"
3. Omnigrid 3"X12"
4. Omnigrid Square ruler 12.5"
5. Creative Grids 8.5" X 24"
6. Clearview 10" 60 degree triangle ruler.
I could get by with just the first 4 rulers. I use the first three rulers 90% of the time.