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How to Sew a Two By Two Quilt Block
The Two By Two quilt block is one of the simplest and most satisfying blocks to sew — perfect for beginners and a great way to use up fabric scraps. It's essentially a four-patch made from just two contrasting fabrics.
Materials:
- Two contrasting fabrics, each cut into two 2½" × 2½" squares
- Sewing machine & thread
- Scissors or rotary cutter & mat
- Iron and ironing board
Instructions:
- Cut two 2½" squares from each of your two fabrics (four squares total).
- Place one square of each fabric right sides together, edges aligned. Sew a ¼" seam along one edge. Press the seam to one side. Repeat with the remaining two squares to make two two-square units.
- Place the two units right sides together with seams aligned and butted. Sew a ¼" seam along one edge. Press the seam to one side.
- Your Two By Two block is complete! Repeat to make as many blocks as needed, then join them together to create your quilt top.
Tip: Use a rotary cutter and mat for more accurate cuts, and always keep your seam allowance consistent so all blocks fit together perfectly.
Four Patch Piecing
The secret to a perfect four patch is pressing seams so they butt together when joined. You can make a four patch by cutting individual squares (great for scrappy quilts) or using pre-joined strips for speed.
Cut two A squares and two B squares in your required size. Using chain piecing, join an A square to a B square, right sides together, with a scant ¼" seam allowance. Press toward the dark fabric. Your result:
Press all seams toward the dark fabric so they butt up. Place the two A/B units right sides together with butted seams, pin if needed, and join with a scant ¼" seam allowance. Press.
Wider Application
This technique applies to all kinds of four patch blocks. As long as a block has a 4×4 grid — no matter how many pieces — the basic principles apply. Keep pressing seams in pairs of opposite directions and piecing will be smooth sailing.
How to Resize Quilt Blocks
The first step in modifying any quilt block is to decide on the finished size. You can base this on doubling a pattern, cutting it in half, or working with your available fabric.
Important: Always remove the seam allowance before doubling or tripling the size. For example, if your pattern calls for 3½" squares, subtract the seam allowances (½"), double the finished block size (3" → 6"), then add the seam allowance back (½"). You'll end up cutting a 6½" piece of fabric.
Resizing Square Blocks
Add ½" to your desired finished block measurement. For a 4" finished square, cut a 4½" square of fabric.
Resizing Rectangular Blocks
Add ½" to both the length and width. To double a block that measures 3" × 4", cut a 6½" × 8½" rectangle of fabric.
Resizing Half-Square Triangle Blocks
Add ⅞" to the desired finished block size. For a 4" finished block, cut 4⅞" squares.
Resizing Quarter-Square Triangle Blocks
Add 1¼" to the desired finished block size. For a 4" finished block, cut your squares 5¼".
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