If I cut my DPlate background sq @ 22.5 , finish at 22 inches and add my little corners and sides @ 2.5, finish at 2.25 each, equals 4.5, that would make my DP block finish at 26.5 (22+2.25+2.25=26.5)
Then I have to have an uneven number of square rows so white would go in center to match my DP block.
if I cut all squares at 2.5 in
11 x 2 (taking away seam allowances)=22
2 on each outer edge top/bottom would be 2.25 each=4.5
so 22+2.25+2.25=26.5
is this correct?