Quilt block · Four-patch · Beginner
London Square quilt block
A large dark triangle and a large light one with a band of half-square triangles and single triangles running corner to corner between them.
What to cut for one block
A 6″ finished block measures 6½″ before it’s sewn into a quilt. Each fabric’s yardage is the least that cuts its strips across the width of fabric, with a strip to spare for straightening.
Background · Snow in the picture
1 large triangle and 7 triangles
- A1 square 5⅜″cut once on the diagonal
- B4 squares 2⅜″cut once on the diagonal
Dark · Navy in the picture
1 large triangle and 7 triangles
- A1 square 5⅜″cut once on the diagonal
- B4 squares 2⅜″cut once on the diagonal
Worked out by @quarterinch/cutting · ¼″ seams included · strips cut across 42″ of usable width · the letters are the pieces the sewing steps name
A 9″ finished block measures 9½″ before it’s sewn into a quilt. Each fabric’s yardage is the least that cuts its strips across the width of fabric, with a strip to spare for straightening.
Background · Snow in the picture
1 large triangle and 7 triangles
- A1 square 7⅝″cut once on the diagonal
- B4 squares 3⅛″cut once on the diagonal
Dark · Navy in the picture
1 large triangle and 7 triangles
- A1 square 7⅝″cut once on the diagonal
- B4 squares 3⅛″cut once on the diagonal
Worked out by @quarterinch/cutting · ¼″ seams included · strips cut across 42″ of usable width · the letters are the pieces the sewing steps name
A 12″ finished block measures 12½″ before it’s sewn into a quilt. Each fabric’s yardage is the least that cuts its strips across the width of fabric, with a strip to spare for straightening.
Background · Snow in the picture
1 large triangle and 7 triangles
- A1 square 9⅞″cut once on the diagonal
- B4 squares 3⅞″cut once on the diagonal
Dark · Navy in the picture
1 large triangle and 7 triangles
- A1 square 9⅞″cut once on the diagonal
- B4 squares 3⅞″cut once on the diagonal
Worked out by @quarterinch/cutting · ¼″ seams included · strips cut across 42″ of usable width · the letters are the pieces the sewing steps name
How it’s sewn
For the 6″ block. Choose another size above and these steps follow it.
- Make 4 half-square triangle units
Sew a Dark B triangle to a Background B triangle along their long edges. Press toward the Dark. Each measures 2″ (1½″ finished).
- Add 2 corner triangles
Sew the Background B triangle across the corner, along its long edge, and press toward the triangle.
- Make 1 section
Sew a Dark B triangle, a half-square triangle unit and a Background B triangle together in a row. Press toward the plain pieces.
- Add a corner triangle
Sew the Dark B triangle across the corner, along its long edge, and press toward the triangle.
- Make 1 section
Sew 2 sections and a Dark B triangle together in a column. Press toward the plain pieces.
- Add a corner triangle
Sew the Background A triangle across the corner, along its long edge, and press toward the triangle.
- Make 1 section
Sew 2 sections together in a row. Press the seams to one side.
- Make 1 section
Sew 2 sections together in a column. Press the seams to one side.
- Add the last corner triangle
Sew the Dark A triangle across the last corner, along its long edge, and press toward the triangle. The block measures 6½″ (6″ finished).
For the 9″ block. Choose another size above and these steps follow it.
- Make 4 half-square triangle units
Sew a Dark B triangle to a Background B triangle along their long edges. Press toward the Dark. Each measures 2¾″ (2¼″ finished).
- Add 2 corner triangles
Sew the Background B triangle across the corner, along its long edge, and press toward the triangle.
- Make 1 section
Sew a Dark B triangle, a half-square triangle unit and a Background B triangle together in a row. Press toward the plain pieces.
- Add a corner triangle
Sew the Dark B triangle across the corner, along its long edge, and press toward the triangle.
- Make 1 section
Sew 2 sections and a Dark B triangle together in a column. Press toward the plain pieces.
- Add a corner triangle
Sew the Background A triangle across the corner, along its long edge, and press toward the triangle.
- Make 1 section
Sew 2 sections together in a row. Press the seams to one side.
- Make 1 section
Sew 2 sections together in a column. Press the seams to one side.
- Add the last corner triangle
Sew the Dark A triangle across the last corner, along its long edge, and press toward the triangle. The block measures 9½″ (9″ finished).
For the 12″ block. Choose another size above and these steps follow it.
- Make 4 half-square triangle units
Sew a Dark B triangle to a Background B triangle along their long edges. Press toward the Dark. Each measures 3½″ (3″ finished).
- Add 2 corner triangles
Sew the Background B triangle across the corner, along its long edge, and press toward the triangle.
- Make 1 section
Sew a Dark B triangle, a half-square triangle unit and a Background B triangle together in a row. Press toward the plain pieces.
- Add a corner triangle
Sew the Dark B triangle across the corner, along its long edge, and press toward the triangle.
- Make 1 section
Sew 2 sections and a Dark B triangle together in a column. Press toward the plain pieces.
- Add a corner triangle
Sew the Background A triangle across the corner, along its long edge, and press toward the triangle.
- Make 1 section
Sew 2 sections together in a row. Press the seams to one side.
- Make 1 section
Sew 2 sections together in a column. Press the seams to one side.
- Add the last corner triangle
Sew the Dark A triangle across the last corner, along its long edge, and press toward the triangle. The block measures 12½″ (12″ finished).
Blocks like it
More like this: Four-patch quilt blocks · all quilt blocks
Questions
Short answers.
Something else? A real person replies.
hello@quarterinch.app
What size should I make it?
Its 4 × 4 grid lands on the ⅛″ marks at 6″, 9″ and 12″, so every piece measures with a ruler at all three. It also cuts cleanly at 4″, 7″, 8″, 10″, 14″, 15″, 16″ and 18″. In Quarter Inch you can make it any size, and it says when a cut falls between the lines.
Can I paper piece it?
Yes. It splits into 2 sections (A and B), each sewn on its own paper in order and then joined with straight seams. In Quarter Inch, the Foundations tab prints its papers at true size (with Quilter).
Is it a good block for a beginner?
It’s a good block for a beginner: 16 pieces in 2 different shapes and 7 points to match. Nothing in it curves or has to be set in. We work the level out from the block’s own geometry, never by eye.