Need a 9 1/2 Block

I think you can just choose a block and do the math to make it what you want . I do that all the time if we are talking about the same thing. I have a book of 501 blocks and another 250 blocks and they all make a 12,1/2 x 12,1/2 on unfinished block. I always think in terms of squares vs. rows. I take my marker and draw lines ( on the picture in the book) to make the number of squares it would take to make that block the size I want. For instance...I am currently making pillows for my living room...I want them 16x16" finished. So I would need 4 squares across and 4 down. I find a block pattern that can be altered into squares (like if they have a flying geese or other piece in the block.. I can't alter that.) I look and draw the squares out on the page. Even if the pattern says to cut a 5"x 5" squares, I will alter that into 2 - 2,1/2x2,1/2 squares. I don't ever work with bias so I never do triangles... I always use HST for the triangle if I need one. Once I have it drawn out, I can alter still more...for a 16x16 I can use either 4rows by 4 rows of 4" squares (finished) or I can do 8 rows by 8 rows of 2" squares. Once I figure all I need, I just add 1/2 is everything and then cut. Sounds complicated, but it isn't once you do it once. If there is a larger area, I always cut that down into squares to equal the size I want. Like if there was a 8"x4" piece...and I was working with 4" squares... instead of cutting 8x4 piece, I'd cut 2, 4x4 pieces so that they would now fit into the math formula of squares. Hope this helps... let me know and I can maybe revise my words better!

off top of my head... if you want a 9,1/2x9,1/2 finished, you'd want 3 rows across by 3 rows down .The equation you'd need to use to break into squares would be 9,1/2 divided by 3 and then you'd add 1/2 to each measurement for the seams and cut squares that measurement x that measurement (don't have a calculator with me!)