I-Cord Phone Strap Crochet Pattern: A Complete Step-by-Step Guide
If you’ve ever fumbled with your phone, dug through a bottomless bag searching for it, or wished you had a stylish way to keep it close, a crocheted phone strap might be exactly what you need. The i-cord phone strap is one of those wonderfully satisfying projects that combines function with creativity — it’s quick to make, incredibly useful, and endlessly customizable. Whether you’re a beginner looking for a confidence-building project or an experienced crocheter wanting something fast and fun, this pattern is for you.
In this guide, you’ll find everything you need to create your own i-cord phone strap from scratch, including a full materials list, step-by-step instructions, tips for adjusting the size, ideas for customization, and answers to the most common questions crafters have about this pattern. Let’s get started.
What Is an I-Cord Phone Strap?
Before diving into the pattern itself, it helps to understand what an i-cord actually is. The term “i-cord” (also sometimes called idiot cord, though the name hardly does it justice) refers to a narrow, tube-like cord created by working in a tight spiral or by using a specific crochet technique to produce a rounded, rope-like structure. Originally popular in knitting, the i-cord concept translates beautifully to crochet, where it produces a smooth, sturdy cord that holds its shape well and resists twisting.
When used as a phone strap, this cord attaches to your phone case — typically through a small loop or ring — and can be worn around your wrist, looped around your body crossbody-style, or hung from a bag. It keeps your device within reach while freeing your hands and reducing the risk of accidental drops.
The crocheted version has a satisfying texture, a gentle stretch depending on the yarn you choose, and a handmade charm that no commercially produced strap can match.
Materials You’ll Need
One of the best things about this project is how minimal the supply list is. You likely already have most of what you need sitting in your craft stash.
Yarn: You’ll want a smooth, strong yarn for this project. Cotton yarn works beautifully because it’s durable, doesn’t stretch excessively, and comes in a wide range of colors. A fingering weight or sport weight cotton gives you a sleek, elegant result. If you prefer something with a bit more texture or a cozy feel, a wool blend in a similar weight works well too. Avoid overly fuzzy or chunky yarns for this particular pattern — they tend to make the cord look bulky and can be harder to work with at this small scale.
Hook: A 2.5mm to 3.5mm crochet hook is ideal for most fingering to sport weight yarns. The smaller end of that range gives you a tighter, firmer cord, which holds up well with frequent use.
Phone case ring or loop attachment: You’ll need a small metal or plastic ring, phone strap attachment, or charm loop to connect your finished cord to your phone case. These are widely available at craft stores or online, often labeled as “phone strap connectors” or “cell phone strap loops.”
Scissors and a tapestry needle: For finishing off your ends.
Optional: Beads, charms, or small decorative elements if you’d like to embellish your strap.
Gauge and Sizing
For this project, exact gauge isn’t critical in the way it would be for a garment, but you do want to make sure your cord isn’t too loose or too stiff. Aim for a cord that feels sturdy but has just a little give when you tug it gently. If it feels rigid and uncomfortable, try going up a hook size. If it feels too stretchy or floppy, go down a hook size.
Suggested finished dimensions:
A wrist strap typically measures around 18 to 22 cm (7 to 8.5 inches) in length, not including any connector hardware. A crossbody strap might be 55 to 65 cm (22 to 26 inches) or longer depending on how you like to carry it. The instructions below are written for a wrist strap length, with notes on how to adjust for longer versions.
Abbreviations Used in This Pattern
ch — chain
sl st — slip stitch
sc — single crochet
BLO — back loop only
magic ring — adjustable ring
The I-Cord Phone Strap Pattern: Step-by-Step Instructions
Foundation
Begin by creating a small loop that will serve as one end of your strap. This loop will either attach directly to your phone case hardware or be folded and sewn to create a clean attachment point.
Step 1: Make a magic ring. If you’re new to magic rings, this is simply an adjustable loop that allows you to begin working in the round without leaving a hole at the center. To make one, wrap the yarn around your finger twice, insert your hook through both loops, pull up a loop of working yarn, and chain one to secure it.
Step 2: Work 6 single crochets into the magic ring. Pull the tail of the ring snug to close the center. (6 sc)
Step 3: Slip stitch to join. This forms a small, flat circle that will become the anchor point of your strap.
Creating the I-Cord
Now comes the main body of the strap. The i-cord texture is created by working single crochets through the back loop only, in a continuous spiral. This technique causes the fabric to curl inward on itself, creating that characteristic tube-like appearance.
Step 4: Chain 2. This does not count as a stitch.
Step 5: Working into the back loop only of each stitch, work 1 single crochet into each of the 6 stitches around. Do not join. Place a stitch marker at the beginning of each round so you can track your progress. (6 sc BLO)
Step 6: Continue working in continuous rounds of 6 single crochets through the back loop only. Do not join at the end of each round — simply keep spiraling. This is the key to achieving that rounded, cord-like structure.
Step 7: Work in this manner until your cord measures your desired length. For a wrist strap, this is typically around 18 to 22 cm (7 to 8.5 inches) from the starting circle. For a crossbody strap, continue until you reach 55 to 65 cm or your preferred measurement.
As you work, you’ll notice the cord naturally tightening into a tube. Give it an occasional tug to keep your tension even and to encourage the cylindrical shape to form.
Creating the Closing Loop
Once your cord has reached the desired length, you’ll create a second loop to mirror the one you started with. This loop will connect to the other piece of hardware or be used for attaching a charm, clip, or wrist loop.
Step 8: Work 1 slip stitch into the next stitch. This anchors the end of the cord.
Step 9: Chain 6 to create a small loop. Slip stitch back into the same stitch to close the loop. This forms a clean attachment point at the end of your strap.
Step 10: Fasten off and leave a tail of approximately 10 cm (4 inches) for weaving in.
Finishing
Step 11: Thread your tapestry needle with the yarn tail at the starting end of your strap. Weave the tail securely through several stitches of the starting circle, pulling gently to close any remaining gap. Weave in the end and trim.
Step 12: Repeat with the finishing tail at the closing loop end.
Step 13: Attach your phone strap hardware. Thread the attachment ring or loop through the starting circle or the closing loop (or both, if your hardware requires it), and follow the manufacturer’s instructions for securing it.
Step 14: If desired, block your finished strap by dampening it slightly and pressing it gently between your palms to even out the cord shape. This isn’t strictly necessary but gives a polished, professional result.
Tips for Getting the Best Results
Keep your tension consistent. The i-cord technique is sensitive to tension changes. If you find that your cord has bumpy or uneven sections, it’s usually a tension issue. Try to maintain a steady, even pull on the working yarn throughout each round.
Use a stitch marker religiously. Because you’re working in a continuous spiral, it can be surprisingly easy to lose track of where one round ends and the next begins. A simple loop of contrasting yarn placed at the start of each round will save you a lot of frustration.
Don’t skip the magic ring. Some crafters prefer to begin with a chain instead of a magic ring, but for this project, the magic ring gives you the cleanest, most secure starting point. It’s worth learning if you haven’t already.
Test your hardware before you finish off. Before you fasten off completely, thread your cord through the attachment hardware and give it a firm tug to make sure the connection feels secure. If it feels weak, you can reinforce it by working an extra slip stitch or two through the loop.
Consider your yarn fiber carefully. For a strap that will see daily use, durability matters. Cotton and nylon blends are excellent choices because they resist abrasion and don’t stretch out with wear. Pure wool, while beautiful, can felt slightly with repeated friction and may not hold up as well over time for this particular application.
Customization Ideas
One of the greatest joys of making your own phone strap is the freedom to personalize it. Here are some ideas to spark your creativity.
Color blocking: Work the first third of your cord in one color, switch to a contrasting color for the middle section, and finish in a third color. The joins between colors are easy to hide within the spiral structure.
Stripes: Change color every few rounds for a striped effect. Carry the unused color along the inside of the cord so you don’t need to cut and rejoin constantly.
Beads: Thread beads onto your yarn before you begin crocheting, then slide one bead into position every few stitches as you work. The beads will nestle within the cord structure, creating a subtle shimmer or pop of color depending on the bead type.
Charms: Attach small charms, tassels, or pom-poms to the closing loop at the end of your strap for a playful finishing touch.
Braided version: Make three thin i-cords and braid them together before attaching the hardware for a thicker, more structured strap with a beautiful woven look.
Crossbody upgrade: For a crossbody strap, you might want to add a swivel clip at one or both ends so that the strap is detachable. This makes it easy to switch the strap between phone cases.
How to Attach the Strap to Your Phone Case
Most phone cases these days are designed to accept a strap, but if yours doesn’t have a built-in attachment point, you’ll need to add one. The most straightforward option is a stick-on phone strap loop — a small adhesive tab with a metal ring that attaches to the back of your case. These are inexpensive, widely available, and hold up well to everyday use.
Alternatively, many phone case manufacturers now sell cases with small holes or integrated loops specifically designed for this purpose. If you’re frequently using straps and find that stick-on attachments peel over time, upgrading to a dedicated strap-compatible case is a worthwhile investment.
Once your attachment hardware is in place, threading your crocheted i-cord through it takes only a moment. Thread the loop at one end of your cord through the ring, then pass the body of the cord through its own loop to create a lark’s head knot. Pull snug, and you’re done.
Frequently Asked Questions
Can beginners make this pattern? Absolutely. If you can make a magic ring and work single crochets, you have everything you need. The back-loop-only technique might feel slightly awkward at first, but it becomes intuitive within the first few rounds.
How long does it take to make? A wrist-length strap typically takes between 30 minutes and an hour, depending on your speed and experience level. Even a crossbody-length strap is usually finishable in an afternoon.
Can I use a different stitch for the i-cord effect? Yes! Some crafters prefer slip stitches through the back loop for an even tighter, firmer cord. You can also try half double crochets if you want something with slightly more texture. Each stitch choice produces a subtly different result, so it’s worth experimenting on a short sample before committing to the full length.
How do I wash my finished strap? That depends on your yarn fiber. Cotton straps can generally be hand washed in cool water with a gentle detergent and air dried. Check the care label on your specific yarn for the most accurate guidance.
What if my cord twists? A small amount of twist is natural with this technique. If you find excessive twisting, try blocking your finished strap as described above, or give the cord a firm but gentle counter-rotation before attaching the hardware.
Why Make Your Own Phone Strap?
In a world where every accessory is commercially available, there’s still something deeply satisfying about making your own. A crocheted i-cord phone strap costs a fraction of what you’d spend on a boutique version, takes only a small amount of yarn and time, and results in something genuinely unique. You can tailor the color exactly to your wardrobe, adjust the length to suit your lifestyle, and put a piece of your own creativity into an everyday object you’ll use dozens of times a day.
It also makes a lovely gift. Because it’s small and quick, you can make a set in multiple colorways for birthdays, holidays, or just because. Pair it with a pretty phone case and a small skein of matching yarn, and you have a thoughtful, handmade present that’s both practical and charming.
Final Thoughts
The i-cord phone strap is one of those projects that earns its place in every crocheter’s repertoire. It’s fast enough for a weeknight, satisfying enough for a seasoned crafter, and useful enough to make over and over again in different colors and lengths. Whether you follow this pattern exactly or use it as a starting point for your own experiments, the result is something you’ll reach for every single day.
Go ahead and cast on. Your hands (and your phone) will thank you.
