Ok when I drew the block out in EQ it said the center black square would be 4-3/4". The 8 color B triangles would be cut from 4 squares @ 3-7/8". The 4 large color C triangles would be cut from 7-3/16" squares. The 12 color D (lightest)triangles would be cut from 6 squares @ 3-7/8".
Hope this helps!
picture of Deb's sample block
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