Two blocks from one set of patches.
Finished blocks: 5 1/4"
Find the complete instructions for the Twin Sisters blocks in Quiltmaker, July/August '10 (#134).
To make a crib quilt (about 30" x 38") as shown in the layout diagram below, you'll need 39 blocks.
For the setting triangles, cut 8 squares, 8 3/4" x 8 3/4", and cut each one in half diagonally twice.
For the corner triangles, cut 2 squares, 4 5/8" x 4 5/8", and cut each one in half diagonally.
Sew the blocks and setting triangles together in diagonal rows. Sew the rows together and add a corner triangle to each corner.