In the Pattern

You will be given instructions to cut pairs of squares. I usually give generous measurements.

How I will show the requirement for Quarter-Square Triangles in the pattern:

The first two lines of the pattern are stipulating that you make Half-Square Triangles, the final line is directing you to take these, and make Quarter-Square Triangles, by the method that is outlined below.

So you can make your own at home:
The rule for working out the size of the squares to cut to make Quarter-Square Triangles:
Add 1 ¼” to the required finished size.

Preparation

Make a pair of Half-Square Triangles as per the Half-Square Triangle TUTORIAL. Press them, however, don’t bother trimming them to size.

On the back of one square, draw a pencil line at 90° to the existing seam, on the diagonal:

line line 2

Sewing

Butt the central seams:

butt seam 1
Push the seams together until they ‘butt’ up against each other;
Not quite there yet …

Sew a scant ¼” seam either side of the diagonal pencil line.

sew 1

Then, cut the seam on the pencil line:

cut 1

Pressing

You have now created two quarter-square triangle blocks. Press the seam without opening the fabrics, to ‘set the seam’; then, open out your block, and press towards the darkest fabric.

Trimming

Now, trim the square to the exact size. Firstly, line up the diagonal (the 45° angle) on your ruler with the seam. Secondly, position the ruler so that the mark that represents half the unfinished finished size is exactly in the centre of the block. This is very important!

qst middle

Trim. Complete.

In Your Language

Quarter Square Triangles METODO TRADOTTO ITALIANO
kindly translated by Lilliana Soli of Fantasy Quilt.