Creating Perfect Square in a Square Quilt Blocks

In my latest pattern, Sunup Quilt, one traditional quilt block that is included in the pattern/design is a Square in a Square Block! I love making these, and last time I made them I realized that I use a couple of little “tricks” to make the process quick and easy. Let me show you!

  1. Start by collection the center square and the 4 triangles needed to make your Square in a Square block. If you’re working through my Sunup Patter, the instructions tell you the sizes to cut and how to cut the triangle pieces.
Four yellow triangular fabric pieces arranged in a row next to a square piece of light blue fabric with a floral pattern.

2. Fold the square in half and use an iron to press a crease in the square. Unfold and repeat to make a perpendicular crease with the first one. Fold each of the triangles in half and use an iron to press a crease in each one, as shown in the photo.

    Three folded fabric pieces shaped like Christmas trees in orange next to a square of teal fabric with a floral pattern.

    3. Place 1 triangle right sides together with the square. Match the crease of the triangle on the long, straight side to the crease on one side of the triangle. Pin in place. Repeat with another triangle piece on the opposite side of the square.

    A quilt block in progress, featuring yellow fabric pinned over a blue floral fabric, set against a dark background.

    4. Sew a 1/4″ seam on each side. Press seams toward the triangles.

    A square quilt block with a teal fabric patterned with small flowers in the center, surrounded by orange triangular fabric pieces, laid on a dark surface.
    A handmade quilt block with a blue floral fabric center and orange fabric corners, resembling a fish shape.

    5. Using a ruler and rotary cutter, trim off the little “dog ears” as shown in photo to create a straight edge.

    A cutting mat with a green Omnigrip ruler placed on it, featuring fabric pieces cut into shapes with a rotary cutter nearby.
    A piece of fabric in the shape of a stylized boat, featuring a turquoise background with small white and orange floral patterns, bordered by orange fabric at the top and bottom.

    6. Place 1 triangle right sides together with one edge of the square. Match the crease of the triangle on the long, straight side to the crease on the edge of the square. Pin in place. Repeat with another triangle piece on the opposite side of the square.

    A piece of fabric arranged in a diamond shape, secured with colorful pins, featuring a patterned blue inner section surrounded by yellow-orange fabric.

    7. Sew a 1/4″ seam on each side. Press seams toward the triangles pieces.

    A piece of fabric patchwork featuring orange triangular sections surrounding a central blue-green patterned square on a dark background.
    A sewing patchwork piece featuring a teal fabric with floral patterns surrounded by orange fabric corners, placed on a dark background.

    8. Trim to size indicated in the pattern. Now you have a perfectly square, Square in a Square block! You may want to use steam or starch to get the creases out of the block, or just sew it into your quilt like this and the creases will come out when the quilt is washed.

      A square quilting ruler with measurements and markings laid on a dark surface, featuring a green and orange design with visible stitching.
      A square fabric piece with a central teal pattern featuring small flowers, surrounded by gold fabric triangles, placed on a dark surface.


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