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Free Pattern – Interlocking O’s Quilt Block

    Today we’re going to sew together this modern-looking traditional quilt block called Interlocking O’s. The pattern is attributed to Doris Dace but I couldn’t find any more information about it other than that. Let’s get to it!

    interlocking o quilt block

    Fabric Requirements for a 16″ Traditional Interlocking O’s Quilt Block:

    • Light/Yellow: 4 – 2.5″ x 4.5″ rectangles
    • Medium/Blue: 4 – 2.5″ squares, 2 – 2.5″ x 4.5″ rectangles, 4 – 2.5″ x 6.5″ rectangles, and 2 – 2.5″ x 8.5″ rectangles
    • Dark/Black: 4 – 2.5″ squares, 2 – 2.5″ x 4.5″ rectangles, 4 – 2.5″ x 6.5″ rectangles, and 2 – 2.5″ x 8.5″ rectangles

    fabric requirements

    Sewing Directions:

    Step 1:

    Sew together a Light/Yellow 2.5″ x 4.5″ rectangles and a Medium/Blue 2.5″ square and press the seam allowance toward the Medium/Blue fabric as shown in the picture below. Repeat to make 2 of these Step 1 units. If you are making a lot of these blocks, this step could be done with the strip-piecing method.

    interlocking o 1

    Step 2:

    Repeat Step 1 using the Medium/Blue 2.5″ x 4.5″ rectangles and the Dark/Black 2.5″ squares.

    interlocking o 2

    Step 3:

    Sew together one Step 1 unit and one Step 2 unit as shown in the picture below. 

    interlocking o 3

    Press the seam allowance away from the Light/Yellow fabric as shown below. Repeat Step 3 for a total of two units.

    interlocking o 4

    Step 4:

    Sew a Dark/Black 2.5″ x 6.5″ rectangle to both long sides of the Step 3 unit as shown in the picture below.

    interlocking o 5

    And press the seam allowances toward the Dark/Black fabric as shown below. Repeat Step 4 for a total of two units.

    interlocking o 4-2

    Step 5:

    Sew a Dark/Black 2.5″ x 8.5″ rectangle to side of the Step 4 unit with the Medium/Blue fabric as shown in the picture below and press the seam allowance toward the center of the unit. (Forgot to take a picture of the back of this unit so you could see the pressing direction – sorry!) Repeat for a total of two units.

    interlocking o 5-1

    Step 6:

    Repeat Steps 1 through 5 using the Light/Yellow 2.5″ x 4.5″ rectangles and Dark/Black 2.5″ squares;

    interlocking o 6-1

    The Dark/Black 2.5″ x 4.5″ rectangles and the Medium/Blue 2.5″ squares;

    interlocking o 6-2

    Sew together;

    interlocking o 6-2

    Add the Medium/Blue 2.5″ x 6.5″ rectangles; and

    interlocking 6-3

    The Medium/Blue 2.5″ x 8.5″ rectangle.

    interlocking 6-5

    Putting It All Together:

    Step 7:

    Lay out the four Step 6 units as shown in the picture below.

    interlocking 7

    Step 8:

    Now you can sew the units together like a simple Four Patch block. First sew the units into two rows as shown in the picture below.

    interlocking o 8

    Step 9:

    And press the seam allowances in opposite directions as you can see in the picture below.

    interlocking o 9

    Step 10:

    Sew the two rows together and you are done!

    interlocking o 10

    Step 11:

    Press the seam allowance. I used the tweak/twirl/furl method as you can see in the picture below.

    interlocking o 11

    In Conclusion:

    While this Interlocking O’s quilt block is very easy to stitch, I got totally confused with the color placement! I highly recommend laying out all the pieces to make sure they are in the right spot. I think this is a great block for a guy’s quilt or baby quilt. I used 2.5″ strips and so the block turned out 16″ square (finished) or 16.5″ square (unfinished). If you wanted a smaller block, I would try using 2″ strips and that would make a 12″ block – just adjust the length of the rectangles accordingly.

    So what do you think of this block? If you give it a try, I’d love to see a picture of it!

    If you like this tutorial and want to see more, simply click HERE to sign up for my newsletter and get a free PDF quilt pattern called “Chained Weathervane”.

    Until next time,

    Happy Quilting!

    Elaine