To make 2 hourglass blocks you need to start with two squares, each from different fabrics. The size of the squares is the finished size, plus 1+1/4" of the needed hourglass block.
Draw a diagonal line on the back of the lighter fabric. Line up the squares.
Stitch 1/4" seams on both sides of the line, and cut the square on the line. Press the seams to the dark fabric.
Place the two new squares together (they are half square triangles now), with opposite colours right sides together. Because the seams are pressed in opposite directions they will "lock" together.
Draw a diagonal line on the back of the fabric.
Stitch 1/4" seams on both sides of the line, and cut the square on the line.
Press the hourglass blocks open.
I spiral the centre seams to reduce the bulk.
Trim the hourglass blocks to the correct size - the finished size plus 1/2" seam allowance.
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