Quilt block diagram
Half-square triangle quilt blocks
A sixteen-unit sampler shows how identical half-square triangles create arrows, diamonds, and movement through rotation.
Block structure
How the geometry is organized
A 4 × 4 grid of equal diagonal units, rotated to create a centered diamond.
- 1Make sixteen equal half-square-triangle units.
- 2Arrange four units per row using the diagram as a rotation guide.
- 3Join rows and preserve the diagonal intersections when trimming.
Finished-size planning
Basic unit sizes
These values divide the finished block evenly for drawing and layout. They do not include seam allowance or method-specific trimming.
6 in block1.50 in unit
8 in block2 in unit
9 in block2.25 in unit
10 in block2.50 in unit
12 in block3 in unit