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To make a 12.5" (unfinished) block:
From your focus fabric:
cut four - 2.5" x 2.5"
cut twelve - 3" x 3"
From your background fabric:
cut four - 2.5" x 2.5"
cut twelve - 3" x 3"
cut one - 4.5" x 4.5"
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(sorry for all the white on white)
Fist we'll make 24 half square triangle blocks. Pair one 3" focus fabric with one 3" background fabric. Mark the diagonal, sew 1/4" on either side of the line, cut and press. Trim to 2.5"
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Lay out your block and sew pieces into sets of four:
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Sew into rows:
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Sew rows together to complete the block.
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