How to Decrease into a Square in C2C Crochet: Step-by-Step Guide

Christa Patel

How to Decrease into a Square in C2C Crochet: Step-by-Step Guide

If you’ve ever wondered how to turn your C2C Triangle into a neat square, this tutorial is perfect for you! Whether you're a seasoned crocheter or just getting started, this simple process breaks it all down so you can follow along with ease. Let’s make those sharp edges and finish your C2C square like a pro.

Looking for a visual walkthrough? Watch the video tutorial here:

What You Need to Get Started

Before we dive in, here’s what I used for this project:

  • Yarn: Any size 4 worsted weight acrylic scraps in colors you love.
  • Hook: A 6 mm crochet hook for smooth stitching.

You can easily adapt this method with different yarns and hook sizes depending on your projects. If you're curious about written patterns, you can find easy-to-follow ones here.

Decreasing Your C2C into a Square: Step-by-Step Instructions

1. Turning Your C2C Triangle Into a Square

Once you’ve finished the increase rows of your C2C triangle, it’s time to begin the decrease rows. The goal is to stop adding blocks and start tapering the edges into a square.

  • Turn Your Work: Instead of building more blocks, slip stitch into the first three stitches of your current block and into the space.
  • Change Colors (Optional): If you’d like to switch yarn colors for variety, finish your last slip stitch with the new color. Hold the yarn tails at the back and chain three to set your height for the next block.

2. Building Your Blocks

In the space after your chain three, work three double crochets to form a new block. Attach this block to the adjacent “staircase” with a slip stitch. Chain three to prepare for the next block and repeat along the row.

Your edge will remain flat because you're not chaining extra stitches to build upward. This creates the gradual decrease that transforms the triangle into a square shape.

TIP: As the rows get shorter, the process becomes even quicker—super satisfying!

3. Finishing Each Row

When you reach the end of a row:

  1. Slip stitch into the space after your last block.
  2. Turn your work and slip stitch back into the first three stitches and the space.
  3. Chain three to start the next block.

Notice how your square edges become more defined with each row!

4. The Final Block

At the last row, you’ll be left with just one block to complete. Work three double crochets into the final space, slip stitch to the previous block, and chain one to secure your yarn. Leave a long enough tail to weave in securely later.

Looking for inspiration for more C2C projects? Check out this ultimate C2C masterclass for more incredible ideas.

Welcome to the Ultimate C2C Masterclass.

Tips for Perfect Decreases

  • Keep your slip stitches consistent: Pull the loop slightly larger for even tension.
  • Rotate your work naturally: It avoids twisting and keeps the edges smooth.
  • Take breaks between rows: Especially for larger squares, step back to admire your progress!

Want more guidance on creating flat edges, changing colors, or making C2C rectangles? Browse through our written patterns library for additional ideas and instructions.

Why You Should Try This Technique

Turning a triangle into a square using the C2C method is not only an essential skill but also a handy technique for creating beautiful blankets, cushions, or wall hangings. Plus, it’s so rewarding to watch your project take shape as the rows get simpler!

Conclusion

That’s all there is to decreasing into a square in C2C crochet! By following this method, you can transform your yarn scraps into stunning, crisp-edged designs. Keep practicing, and soon you’ll be able to tackle even more complex C2C projects with confidence.

Want to learn more about crochet? Check out my easy crochet projects for beginners or join my community for updates on free tutorials and patterns!

Tag me in your finished projects with #SecretYarnery—I’d love to see your creations. Happy crocheting!

Left Handed?

FAQs 

1. What is Corner-to-Corner (C2C) Crochet?

C2C crochet is a popular technique where you work your project by building small "blocks" diagonally from one corner to the other. It's great for creating geometric shapes and designs.

2. How do you know when to stop increasing in C2C crochet?

You stop increasing when one side of your triangle reaches the desired width of your square. From then on, you’ll start decreasing rows to shape it into a square.

3. What happens if my C2C triangle doesn’t look even?

Uneven edges are often caused by inconsistent tension. Be sure to keep your slip stitches uniform and work carefully into the proper stitches.

4. Can I use this method with different yarn weights?

Yes! You can adapt this method to any yarn weight or hook size. Just remember, the final square size will vary based on your materials.

5. What are some uses for C2C crochet squares?

C2C squares are versatile! Use them for blankets, cushion covers, tote bags, wall hangings, or combine multiple squares into larger projects.

6. How do I change colors while decreasing?

To change colors, make the final yarn-over of your last double crochet using the new color. Hold the tails at the back, then continue with the next block.

7. Why are my edges curling?

Curling edges can result from too tight slip stitches or tension. Adjust your grip and make sure your stitches remain loose and even.

8. How do I weave in the yarn ends for a clean finish?

Use a yarn needle to guide the tail ends through the back of your rows, following the direction of the stitches. Ensure the ends are secure to prevent unraveling.

9. Can I make rectangles with this method?

Yes, C2C crochet can also be used for rectangles by alternating increase and decrease rows. Check out tutorials for creating rectangles in the C2C style.

10. What’s the easiest way to practice this technique?

Start with small squares using scrap yarn. Smaller projects allow you to master the tension, decreasing, and slip stitches before moving onto larger tasks.

Christa Patel is a passionate crochet artist and founder of The Secret Yarnery, where she shares her love for all things crochet. With over a decade of experience, Christa specializes in creating beginner-friendly tutorials and easy-to-follow patterns that inspire creativity and confidence.

Her work is dedicated to making crochet accessible to everyone, from absolute beginners to advanced crafters. Christa's vibrant designs and practical tips have helped thousands of crocheters around the world improve their skills, one stitch at a time.

When she’s not crocheting, Christa enjoys exerimenting with new yarns, teaching live classes, and connecting with her community of crocheters. She believes that crochet is more than just a craft—it's a form of self-expression and relaxation.

Follow Christa on her journey and join the crochet community for tutorials, free patterns, and creative project ideas:

Let Christa help you turn yarn into art, one stitch at a time!

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