Making hourglass blocks

A tutorial on how I make hourglass blocks

1. Cut out two fabric squares 1 inch larger than the UNfinished size you need. The blocks I need to make finish at 3 inches. UNfinished they are 3 1/2 inches, so I cut 4 1/2 inch fabric squares.

2. This is similar to making half square triangles (HST). On the wrong side of the lighter fabric square draw a diagonal line from one corner to the opposite corner. Place the two squares right sides together (RST).

3. Sew 1/4 inch away from your draw line. This will make TWO half square triangles...sew on either/both sides of the draw line. I chain piece these.

4. Cut ON the draw line to yield two halves.

5. Press triangle open to reveal two HST.

These are the two HST I need to make my hourglass blocks.

6. On the wrong side of the HST draw a diagonal line from corner to corner.

7. Place two HST with RST and 'nest' seam allowances.  You may wish to pin to insure accuracy.

7. Place two HST with RST and 'nest' seam allowances. You may wish to pin to insure accuracy.

8. Just as before, sew 1/4 inch away from your draw line. This will make TWO hourglass blocks...sew on either/both sides of the draw line. Again, I chain piece these.

*Tip: Before you cut these apart you can fold the block open to check for accuracy.

9. Cut ON the draw line.

9. If you achieved accurate seams, cut on the draw line to yield two halves.

10.  Press open to reveal two hourglass blocks!

10. Press open to reveal two hourglass blocks!

11. Trim hourglass block to exact 3 1/2 inch square.

Trimming is worth the effort.

It doesn't take long before there is a stack of perfect 3 1/2 inch hourglass blocks, and there was little fuss with wonky bias triangle edges!!

It is easy to chain piece these blocks.

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2 Comments

Filed under Quilting

2 responses to “Making hourglass blocks

  1. Pingback: half square triangles + sample block = math « Piecefully

  2. Very nice, clear instructions. Thank you! 🙂

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