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Parallelogram

Diagram of the Parallelogram quilt block layout
Design with this block

Techniques used (complete these first)

Diamond in a Rectangle

Diamond-in-a-Rectangle Unit

Construct a diamond-centered rectangle by joining mirrored side triangles to opposite edges and trimming to exact unfinished size.

  1. Cut the center rectangle and side triangles slightly oversized according to your unit size plan.
  2. Mark the midpoint on the long edges of the center rectangle and on the long edge of each side triangle.
  3. Align midpoint to midpoint, then match corners and sew one triangle to each opposite side with a 1/4 inch seam.
  4. Press seams away from the center rectangle and repeat for the remaining sides if required by your variant.
  5. Trim the completed unit to unfinished size, keeping at least 1/4 inch seam allowance beyond all key points.

Pro tip: Treat mirrored triangle pairing as mandatory; if both sides are cut in the same orientation, the diamond will lean and the unit will not trim square.

Midpoint Triangle Join

Triangle-to-Edge Join

Attach a regular triangle to a square or rectangle edge by matching center points first, then sewing a standard 1/4 inch seam.

  1. Fold the base edge (square or rectangle side) in half and finger-press to mark its midpoint.
  2. Fold the triangle along its base to mark the midpoint of the long edge.
  3. Place triangle and base right sides together, align midpoint marks first, then align both corners and pin.
  4. Sew with a regular 1/4 inch seam from one end to the other without stretching either edge.
  5. Press the triangle away from the base and trim dog ears if needed before adding the next seam.

Pro tip: Pinning the midpoint first prevents the triangle point from drifting left or right; this is the key to keeping points centered across repeated units.

Subunits first

Using the techniques listed above, make the following sub units: 1 Parallelogram Unit.

Block Assembly

Assembly instructions are currently in the works, check back soon for updates!

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