Originally Posted by quilter 1234
Example .. block is 6 inches finished, sashing is 2 inches finished, therefore I consider by block as an 8 inch block and figure my corner and side triangles accordingly
Exactly! And that's just what the quiltville site says. It's quite simple really, if you don't over think it. The finished width of the block (6") + the finished width of the sashing (2") = the finished width of the sashed block (8"). You figure the setting corners and triangles using the finished width of the SASHED block.