C2C, or corner-to-corner crochet, is a technique worked diagonally in small blocks, starting at one corner and growing to the opposite corner. Each block is a few stitches, and changing block colors lets you 'draw' pixel-art pictures, called graphgans.

How do you start a C2C crochet project?

You start in one corner with a single block — typically a chain, then double crochets worked into the chain. Each new row adds one block on the increase, building diagonally until you reach the widest point, then you decrease back down to the opposite corner.

What stitch is used in C2C crochet?

The classic C2C block uses chains and double crochets — usually chain three, then three double crochets per block. There is also a 'mini C2C' using half double or single crochet for finer detail and a tighter fabric.

How do you read a C2C graph?

A C2C graph is a grid where each square is one block, and the colors show the picture. You read it diagonally, following the same corner-to-corner path your hook travels, changing block colors to match each square on the chart.

How do you change colors in C2C?

Change color on the last pull-through of the final double crochet of a block, so the next block starts in the new color. Carry or cut colors depending on how often they recur, just as in standard color changing.

How do you increase and decrease in C2C?

On the increase half, you add one block at the start of each row by chaining and building a new block off the previous row. On the decrease half, past the midpoint, you slip stitch across to skip adding a block, so each row has one fewer block until you reach the final corner.

Is C2C crochet good for beginners?

C2C is an approachable intermediate technique. The block itself is simple, and the repetitive rhythm is easy to learn. The main challenges are reading the graph and managing colors, both of which become easier with practice.

What can you make with C2C crochet?

C2C is famous for graphgan blankets that form pictures, characters, letters, and geometric designs. It is also used for cushion covers, baby blankets, and wall hangings — anything that benefits from pixel-style colorwork.

Crochet Techniques

How to C2C Crochet (Corner to Corner) for Graphgan Designs

Published June 22, 2026

Corner-to-corner crochet — almost always shortened to C2C — is the technique behind those striking 'graphgan' blankets that form detailed pictures, characters, and bold geometric designs, all out of crochet. Instead of working in straight rows or rounds, C2C builds the fabric diagonally in small blocks, growing from one corner to the opposite corner. Because each block can be a different color, the finished fabric becomes a grid of pixels you can use to 'draw' almost any image. It looks impressive and complex, but the underlying block is simple and repetitive — making C2C a hugely rewarding intermediate technique once you understand its diagonal rhythm.

What Is C2C Crochet?

C2C crochet is a method of building fabric diagonally, one small block at a time, starting at a single corner. Each block is a tiny unit — classically a chain-three followed by three double crochets. You add blocks along a diagonal, increasing each row until the work reaches its widest point at the opposite corners, then decreasing back down to the final corner. By assigning colors to blocks according to a charted grid, C2C turns crochet into pixel art. The technique is essentially 'painting by blocks,' where each block is one pixel of the picture.

Why C2C Matters

C2C matters because it makes detailed colorwork pictures achievable for crocheters who are not ready for the complexity of tapestry or intarsia worked in rows. The diagonal block structure is forgiving and rhythmic, and the graph-reading is intuitive once you see how the diagonal path maps to the chart. It has become one of the most popular techniques for personalized gifts — blankets with names, characters, sports logos, and portraits. It leans heavily on clean color changing, making it a natural next step once that skill is solid.

When to Use C2C

Use C2C whenever you want a pixel-art design in crochet: graphgan blankets with pictures or letters, geometric and gradient throws, baby blankets with charted motifs, cushion covers, and wall hangings. It is also a great way to use up yarn in planned color blocks. C2C is specifically a colorwork-and-picture technique, so it pairs naturally with the projects in the beginner pattern hub, where many graphgan patterns provide ready-made charts to follow.

Materials You Will Need

You need worsted-weight yarn in the colors of your chosen design, a 5.0 mm to 6.0 mm hook, scissors, a yarn needle, and — most importantly — a C2C graph or chart for your picture. Small bobbins or wound mini-balls for each color keep things tangle-free, since C2C can involve many color changes. A printed chart you can mark off row by row prevents losing your place. The smooth, light yarn and dependable hook recommended in our crochet basics make learning the block easiest before you add color complexity.

Step-by-Step: The C2C Block and Increases

Starting block: chain six, then double crochet into the fourth chain from the hook and the next two chains — that is your first block. Increase rows: chain six, double crochet into the fourth chain from the hook and the next two chains to form a new block, then slip stitch into the 'turning' space of the previous block and chain three, three double crochets into that space to build the next block. Continue adding one block per row, working back along the diagonal. Each increase row has one more block than the last, until you reach the design's widest point.

Step-by-Step: The C2C Decreases

Once you pass the midpoint of a square design (or the relevant corner of a rectangle), you switch from increasing to decreasing so the fabric tapers back to the opposite corner. Instead of chaining six to add a block at the start of the row, you slip stitch across the top of the first block to 'step down,' then continue working blocks across. This removes one block per row. You alternate or combine increasing and decreasing edges depending on whether your project is square or rectangular, until a single final block closes the opposite corner.

Reading a C2C Graph and Changing Colors

A C2C graph is a grid where each square represents one block and its color. You read it along the same diagonal path your hook travels, matching each block to its charted color. To change color, work the block in the current color until the last double crochet's final pull-through, then complete it in the next block's color — exactly the color-change method used throughout crochet. Carry colors that recur soon; cut and rejoin colors used in isolated spots. Marking off each row on a printed chart keeps you oriented.

A Visual Way to Picture It

Picture filling in a piece of graph paper one square at a time, moving in diagonal stripes from one corner toward the other. Each crochet block is one filled-in square, and its color is the color you would shade that square. As the diagonal rows stack, the picture emerges pixel by pixel, just as an image resolves on a low-resolution screen. That graph-paper image is exactly how C2C designers plan their charts.

Common C2C Mistakes

The most common mistakes are losing your place on the graph, changing color at the wrong moment so block colors bleed, miscounting blocks per row (which distorts the square), and tangling multiple color balls. Beginners also sometimes confuse the increase and decrease edges, ending up with a lopsided shape. Tension matters too: uneven block tension makes the pixel grid irregular. Keeping a marked chart and using bobbins solves most of these problems before they start.

Troubleshooting C2C

If your design looks distorted, recount your blocks per row against the chart — a missed or extra block shifts everything. If colors bleed at block edges, change color on the last pull-through of the block, not the start of the next. If your square is not square, check that you switched from increasing to decreasing at the correct midpoint. If balls tangle, switch to bobbins. And if the fabric is uneven, even out your block tension — the same consistency principle stressed in our common crochet mistakes guide.

Project Examples Using C2C

C2C is the technique of choice for picture blankets: character graphgans, name and monogram blankets, sports-team throws, holiday designs, and pixel-art portraits. It also makes bold geometric and gradient blankets, cushion covers, and wall art. Because it produces large colorwork pieces, C2C benefits from a final blocking to even the grid, and from the same clean color management used across all colorwork. You will find many graphgan charts ready to crochet in the beginner pattern hub.

Conclusion

C2C crochet turns the craft into pixel art, building detailed pictures and bold designs diagonally, one simple block at a time. Master the basic block, the increase and decrease edges, and clean color changes, and you can crochet almost any charted image into a blanket. Keep a marked graph, use bobbins for your colors, and block the finished piece for a crisp grid. With C2C in your toolkit, personalized graphgans are within reach — explore related colorwork and embellishment across the essential techniques library.