Master The Art Of Shaping: How To Increase Crochet Stitches Like A Pro

To increase crochet stitches, work two or more stitches into the same stitch of the previous row or round, expanding the width or circumference of your fabric. This structural technique, commonly abbreviated as "inc" in crochet patterns, is critical for shaping garments, hats, shawls, and amigurumi toys. Executing increases with proper tension control and loop placement prevents unsightly gaps and ensures a smooth, professional drape.

Technical Preparation, Tooling, and Gauge Calculations

Successful fabric shaping relies heavily on planning and selecting the correct gear. Before executing increases, you must understand how different yarn fibers, hook shapes, and stitch structures interact. Increasing adds physical bulk to a specific point in your fabric, which can distort your work if tension is inconsistent or if the yarn splits.

Essential Tools & Materials Checklist

• Crochet Hooks: Use inline or tapered ergonomic hooks. Tapered hooks (such as Clover Amour) are highly recommended for amigurumi and tight increases because their pointed tips slip easily under tight loops.
• Yarn Selection: Smooth, multi-ply worsted or DK weight yarn (cotton, wool, or acrylic blends). Avoid highly textured, fuzzy, or single-ply roving yarns when practicing increases, as they obscure stitch definition.
• Locking Stitch Markers: Vital for identifying the exact location of your increases, especially when working in continuous rounds.
• Flexible Measuring Tape: Used to verify that your rate of increasing matches the desired schematic measurements.
• Tapestry Needle: For weaving in ends securely without distorting edge increases.

Mandatory Prerequisite Knowledge

• Stitch Anatomy identification: You must be able to identify the front loop (the loop closest to you), the back loop (the loop furthest from you), and the underlying post of the stitch.
• Tension Control: The ability to pull up consistent loop heights. Tight crocheters often struggle with increases because inserting a hook into an already worked stitch can be difficult and can split the yarn.
• Pattern Abbreviation Reading: Familiarity with standard terminology, such as single crochet (sc), double crochet (dc), half double crochet (hdc), and increase (inc).

Project Benchmarks & Budget

• Estimated Learning Curve: 15 to 30 minutes of focused practice on a gauge swatch.
• Estimated Budget: $5 to $20 depending on yarn and hook choices.
• Structural Standard: A correct increase should not create a hole larger than the surrounding stitches, nor should it cause the fabric to buckle or ripple unless a decorative edge is intended.

Step-by-Step Execution of Core Increasing Methods

Different crochet fabrics require different increase styles. A tight, dense toy requires an invisible increase to prevent stuffing from leaking, while a flowing garment or a triangular shawl needs standard or decorative increases to preserve drape and elasticity.

Step 1: Executing the Standard Single Crochet Increase (sc inc)

The standard single crochet increase is the foundation of toy making, hat crowns, and basic flat circles.

1. Identify the target stitch from the previous row or round. Look for the top "V" shape formed by the front and back loops.
2. Insert your hook from front to back under both loops of this "V".
3. Yarn over (wrap the yarn from back to front over the hook) and pull a loop through. You now have two loops on your hook.
4. Yarn over again and pull through both loops on your hook. This completes your first single crochet stitch.
5. To perform the increase, insert your hook back into the exact same stitch you just worked. Do not move to the next stitch.
6. Yarn over and pull a loop through (two loops on hook).
7. Yarn over and pull through both loops. You have now worked two single crochet stitches into a single base stitch, increasing your stitch count by one.

Pro-Tip: If you find it difficult to insert the hook back into the same stitch for the second single crochet, your tension is too tight. Avoid pulling tightly on the working yarn after completing the first stitch. Keep the loop on your hook resting comfortably on the thickest part of the hook shaft to maintain the correct loop size.

Step 2: Executing the Seamless Invisible Increase (inv inc) for Amigurumi

Standard increases in tight single crochet projects can leave small gaps or bumps. The invisible increase solves this by utilizing only the front loops of two adjacent stitches, compressing the fabric seamlessly.

1. Locate the next two unworked stitches in your round.
2. Insert your hook under the front loop only (FLO) of the first stitch, moving from the bottom-center of the stitch up and out. Do not yarn over yet.
3. With that loop on your hook, swing your hook tip down and insert it under the front loop only (FLO) of the second adjacent stitch. You now have the working loop plus two front loops on your hook.
4. Yarn over and pull the yarn through the first two loops on your hook (the two front loops you picked up). You will now have two loops remaining on your hook.
5. Yarn over once more and pull through both remaining loops on your hook.

Warning: The invisible increase is highly directional and designed specifically for projects worked in the round with the "right side" facing out. Do not use this technique when working flat, back-and-forth rows, as the back of the invisible increase creates a prominent ridge that will ruin the texture of the reverse side.

Step 3: Executing the Standard Double Crochet Increase (dc inc)

Double crochet increases are used in garments, blankets, and top-down raglan sweaters to expand the fabric rapidly while maintaining a soft, flexible drape.

1. Yarn over from back to front.
2. Insert your hook under both loops of the target stitch.
3. Yarn over and pull up a loop. You now have three loops on your hook.
4. Yarn over and pull through the first two loops on your hook (two loops remain).
5. Yarn over and pull through the remaining two loops. This completes the first double crochet.
6. Yarn over again to prepare for the second stitch.
7. Insert your hook back into the same base stitch where you just completed the first double crochet.
8. Yarn over, pull up a loop (three loops on hook), yarn over, pull through two loops, yarn over, and pull through the final two loops.

Pro-Tip: Because double crochet stitches are tall, working two of them into one stitch can pull the base of the stitch open, creating a small hole. To minimize this, ensure you pull up your first loop snug against the previous row before completing the stitch steps.

Step 4: Executing Edge Increases on Rows

Increasing at the very edge of a row is common when shaping sleeves or triangular shawls. Working an increase into the very first or very last stitch can sometimes create a bumpy, unstable edge.

1. To increase at the beginning of a row: Work your turning chain as directed by the pattern. Instead of skipping the first stitch (which is standard in double crochet to prevent flared edges), work your first stitch and its increase partner directly into that very first stitch at the base of the turning chain.
2. To increase at the end of a row: Work across the row until you reach the final stitch (or the top of the turning chain from the previous row). Work two stitches directly into that final stitch.
3. For a cleaner edge on garments, perform the increase one stitch inset from the edge. For example, work one normal stitch in the first stitch, perform your increase in the second stitch, work across the row, perform an increase in the second-to-last stitch, and work a normal stitch in the final stitch. This leaves a clean column of single stitches at the border for easy seaming.

Comparative Analysis of Stitch Increase Methods

Selecting the correct increase method requires matching the structural needs of your fabric with the physical characteristics of the stitch. The table below outlines the technical differences, elasticity ratings, and primary applications of each method.

Diagnosing and Correcting Shaping Failures

When shaping crochet fabric, small errors in placement or tension can lead to structural failures. Below are the most common real-world errors encountered when increasing, along with their diagnostic causes and immediate solutions.

Scenario 1: Large, Unattractive Holes at the Base of the Increase

• Root Cause: Loose tension, using a crochet hook that is too large for the yarn weight, or pulling upward too aggressively when pulling up the first loop of the second stitch. This stretches the loops of the parent stitch, leaving a gap.
• Actionable Fix: First, try working the first loop of your second stitch tighter to keep the base compact. If the hole remains, switch to working the first stitch of the increase under both loops, and the second stitch of the increase into the back loop only (BLO) or the back bar of the same stitch. This anchors the second stitch securely and covers the gap. If the issue persists across the entire project, drop down one full hook size (e.g., from 5.0mm to 4.5mm).

Scenario 2: The Fabric is Puckering, Ruffling, or Forming Waves

• Root Cause: You are increasing too frequently or adding too many stitches in a single row or round. In circular crochet, there is a strict mathematical formula for flatness: you must add exactly the same number of stitches in each round as you started with in round one (e.g., starting with 6 single crochets means adding exactly 6 increases per round). If you exceed this rate, the extra fabric has nowhere to go and will begin to ripple.
• Actionable Fix: Rip back (frog) your work to the point where the fabric was flat. Recalculate your stitch counts. Ensure your increases are evenly spaced throughout the row or round. If you are following a pattern, verify your stitch count at the end of the row using locking stitch markers to ensure you did not accidentally add extra increases.

Scenario 3: Flat Circles are Turning into Hexagons (Cornering)

• Root Cause: Stacking your increases directly on top of the increases from the previous round. When increases are worked into the exact same relative positions round after round, they create prominent points, transforming a smooth circle into a polygon.
• Actionable Fix: Stagger your increases. If your pattern dictates "Increase, 2 single crochet" repeated, alternate the placement in the next round so the increases fall on the plain stitches of the previous round. For example, work "1 single crochet, increase, 1 single crochet" to keep the increases offset. This distributes the bulk evenly and keeps the shape perfectly circular.

Scenario 4: Edge Increases are Causing a Jagged, Uneven Border

• Root Cause: Working the increase into the very edge chain or the turning chain inconsistently, which pulls the border stitches out of alignment.
• Actionable Fix: Implement the "In-Set" increase method. Never place your increase in the very first or very last stitch of a row. Instead, work one standard stitch at the beginning and end of the row, and place your increases in the second and second-to-last stitches. This preserves a perfectly straight vertical edge for easy mattress-stitch seaming or border additions.

Frequently Asked Questions

Does an increase count as one or two stitches when counting my row?

An increase results in two separate stitches standing in the space of one parent stitch. Therefore, when counting your finished row or round, you must count each of those two individual top "V" shapes separately. An increase adds exactly one net stitch to your total count.

Can I increase using different stitch heights, like a single crochet and a double crochet in the same space?

Yes. Mixing stitch heights in a single increase is a common technique used in decorative borders, shell stitches, and leaf patterns to create rapid shifts in height. However, this is usually classified as a stitch pattern rather than a standard utility increase.

How do I increase when working in the back loop only (BLO)?

To increase in the back loop only, simply work both of your stitches into the back loop of the target stitch instead of going under both loops. This maintains the clean horizontal ridge pattern on the front of your fabric while expanding the width.

How do I prevent my work from curling when I start increasing?

Curling often occurs if your initial foundation chain or starting round is worked too tightly. If your stitches do not have enough physical space at their base, they will cup or curl upward. Try using a hook one size larger for your foundation row, then switch back to your project hook once you begin your increase patterns.

Refine Your Craft with Professional Crocheting Techniques

Now that you have mastered the technical mechanics of increasing, you can confidently tackle complex garment schematics and three-dimensional designs. Practice these distinct increase styles on small swatches to observe how fiber memory and tension variations influence the drape of your finished projects.