Used with most quilty projects is a 6 1/2 x24",6 1/2 x 12 1/2" & 6 1/2" sq.Have several triangle rulers,a new 6 1/2" sq I hate :(,the flying geese set from QIAD....not opened & a 12 !/2" sq seldom used, as I'm not making many 12 1/2" blocks anymore.
There are others ,either never used or seldom used.But ,hey...I'm prepared for that next block :)