This beautiful Knots & Crosses quilt is made using 2 1/2" strips (not just any strips).
The Ombre Strip Set from Maywood Studio.
This give the quilt that wonderful illuminating effect.
You will need to make half square triangles from the 2 1/2" strips.
The template is included in the pattern.
Finished size: 74" x 92"
You could also use:
The Goddess Tool
Mini Easy Angle