Introduction
Have you ever started a knitting project only to find your cast on edge too tight, too loose, or just plain messy? You’re definitely not alone. The cast on method you choose can make or break your entire project before you even knit the first row.
The long tail cast on is probably the most popular cast on technique in knitting, and for good reason. It creates a beautiful, stretchy edge that works for almost any project. Whether you’re making a cozy scarf or a fitted sweater, this method gives you that professional finish right from the start.
In this guide, you’ll learn everything about the long tail cast on. We’ll walk through exactly how to do it, why it works so well, and how to avoid common mistakes. You’ll also discover when to use it and when you might want to try something else. By the end, you’ll feel confident casting on your next project like a pro.
What Is the Long Tail Cast On?
The long tail cast on is a knitting technique that creates your first row of stitches on the needle. It’s called “long tail” because you need to leave a long strand of yarn hanging before you start. This tail gets worked into the cast on as you go.
This method actually creates two things at once. You get your cast on stitches plus a row that looks like knitting. That’s why it’s so efficient and popular among knitters of all skill levels.
The edge it creates is elastic and attractive. It has just enough stretch for ribbing, cuffs, and hems. Yet it’s stable enough that it won’t get floppy or lose its shape over time.
Think of it as the Swiss Army knife of cast ons. It works for sweaters, hats, blankets, and pretty much anything else you want to knit. Once you master this technique, you’ll probably use it for about 80% of your projects.

Why Knitters Love This Method
Versatility for Every Project
The long tail cast on adapts beautifully to different yarn weights and needle sizes. You can use it with chunky yarn on big needles or fine thread on tiny ones. The technique stays the same regardless of what you’re making.
It works particularly well with ribbing patterns. The elasticity matches perfectly with k1p1 or k2p2 ribbing. Your cuffs and hems will have that professional bounce that stays put wash after wash.
Speed and Efficiency
Once you get the hang of it, this cast on is remarkably fast. You’re essentially knitting and casting on simultaneously. Many knitters find they can cast on 100 stitches in just a few minutes.
The rhythm becomes almost meditative. Your hands learn the motion, and you can cast on while watching TV or chatting with friends. It’s one of those techniques that truly becomes muscle memory.
Professional Looking Results
The edge created by the long tail cast on looks clean and polished. It lies flat without curling, which is especially important for garments. You won’t need to block aggressively to get your edges to behave.
The stitches line up evenly when done correctly. This creates a neat foundation row that makes your whole project look more professional. First impressions matter, and your cast on edge is definitely making one.
Step by Step Instructions
Estimating Your Tail Length
Here’s where many beginners get tripped up. You need to leave enough tail yarn to complete all your cast on stitches. Running out of tail halfway through is frustrating and means starting over.
A good rule of thumb is to allow about one inch of tail per stitch you’re casting on. If you need 50 stitches, leave at least 50 inches of tail. I always add an extra 6 to 8 inches just to be safe.
You can also wrap the yarn around your needle once for each stitch you need. This gives you a visual measurement. Pull out that length of yarn, then add your safety margin.
Getting Into Position
Make a slip knot at the point where your tail measurement ends. Slide this slip knot onto your needle. This counts as your first stitch.
Hold the needle in your right hand. Let both strands of yarn drape over your left hand. The tail end goes over your thumb, and the working yarn goes over your index finger.
Use your other three fingers to hold both strands against your palm. This keeps tension consistent as you work. Your left hand basically forms a yarn slingshot shape.
Creating Each Stitch
Insert your needle up through the loop on your thumb. The needle goes from bottom to top, scooping under that thumb loop. Keep the motion smooth and confident.
Now swing the needle over to catch the strand on your index finger. Wrap that strand around the needle from back to front. You’re essentially doing a little knit stitch motion here.
Bring the needle back down through the thumb loop. You’ve now created a new stitch on your needle. Drop the thumb loop and use your thumb to pull the tail snug.
Reset your hand position with fresh loops on your thumb and finger. Repeat the process for each additional stitch. The rhythm becomes insert, wrap, through, drop, tighten, reset.
Maintaining Even Tension
Tension is everything in the long tail cast on. Too tight, and your cast on edge will be rigid and hard to work. Too loose, and it’ll look sloppy and stretched out.
Aim for stitches that slide easily along the needle but aren’t gaping wide. They should look uniform in size. If one stitch seems tighter or looser than the others, adjust your next few stitches to compensate.
The tail you pull after each stitch controls the tightness. Pull gently but firmly. Think of it like tying your shoes: snug but not strangling.
Common Mistakes and How to Fix Them
Running Out of Tail
This is the number one frustration for beginners. You’re halfway through casting on, and suddenly there’s not enough tail left. Unfortunately, there’s no easy fix once this happens.
You’ll need to pull out all your stitches and start over. This time, be more generous with your tail estimate. It’s always better to have too much tail than too little.
Some knitters leave a really long tail and then use the excess for seaming later. This kills two birds with one stone. You avoid running short, and you have thread ready for finishing.
Twisted Stitches
Sometimes your cast on stitches end up twisted on the needle. This happens when you don’t keep track of which strand goes where. Twisted stitches are difficult to work on your first row.
Make sure the tail always stays on your thumb and the working yarn stays on your index finger. Don’t let them switch places. If you do accidentally twist a stitch, you can usually untwist it before moving on.
Watch your needle motion carefully. The needle should always go up through the thumb loop first, then catch the index finger strand. Reversing this order creates twisted stitches.
Uneven Edge
If your cast on edge looks bumpy or irregular, you probably have tension issues. Some stitches are too tight while others are too loose. This usually evens out with practice.
Try to maintain the same gentle pull on the tail after each stitch. Find a rhythm that works for you. Count out loud if it helps you stay consistent.
You can also try using a needle one size larger for your cast on. This automatically creates a slightly looser edge. Then switch to your project needle for the first row.

When to Use the Long Tail Cast On
Perfect Projects
This cast on shines for anything with ribbing at the edges. Sweater cuffs, sock tops, and hat brims all benefit from its elasticity. The stretch matches the ribbing beautifully.
It’s also excellent for scarves and blankets. The edge lies flat and looks attractive from both sides. You won’t have any weird curling or rolling at the cast on edge.
Bottom up sweaters love this cast on too. The hem sits nicely and doesn’t flare out. It gives structure without being stiff or uncomfortable.
When to Choose Something Else
Very stretchy projects might need a more elastic cast on. Lace shawls often work better with a different method. The long tail cast on can be too firm for delicate, open patterns.
If you’re doing a provisional cast on that you’ll remove later, you obviously can’t use this method. It’s meant to be permanent. You’d need something like a crochet provisional instead.
Top down projects sometimes benefit from other cast ons too. If you’re starting at a neckline with short rows, you might want something more flexible. Always think about the specific needs of your pattern.
Tips for Success
Practice Makes Perfect
Don’t expect to nail this on your first try. Like any knitting technique, the long tail cast on improves with repetition. Cast on 20 or 30 stitches, then rip them out and do it again.
Use a smooth, medium weight yarn for practice. Slippery or fuzzy yarns can be harder to control when you’re learning. Save those for after you’ve got the basics down.
Focus on consistency rather than speed at first. Speed comes naturally once your hands learn the motion. Slow, deliberate practice builds better muscle memory than rushing.
Using Both Hands
Some knitters struggle with the left hand position at first. Your thumb and finger need to maintain those loops while your other fingers hold tension. It feels awkward initially.
Try practicing the hand position without the needle. Just make the thumb and finger loops, then release and reform them. Get comfortable with that motion first.
You can also try sitting with your left elbow propped on a table. This gives stability while you’re learning. Once the motion feels natural, you can work anywhere.
Counting As You Go
It’s easy to lose count when you’re focused on technique. Use stitch markers every 10 or 20 stitches. This makes counting much easier and helps you catch mistakes sooner.
Some knitters say the numbers out loud as they cast on. This helps maintain rhythm and keeps track of progress. Others prefer to mark their pattern with a pencil as they go.
If you mess up the count, it’s usually obvious on the first row. You’ll either have too many or too few stitches. Don’t be afraid to rip back and recount if something seems off.
Troubleshooting Advanced Issues
Working With Difficult Yarns
Slippery yarns like silk or bamboo can slide around more than usual. You might need to hold them with slightly more tension. The loops want to loosen on their own.
Fuzzy or hairy yarns make it hard to see your stitches clearly. Take your time and use good lighting. You might need to feel the stitches with your fingers to keep them even.
Stretchy yarns like those with elastic content need a gentler touch. They want to bounce back, which can throw off your tension. Don’t fight the yarn’s natural properties.
Adjusting for Large Stitch Counts
Casting on 200 or 300 stitches gets tiring. Your hands might cramp, and maintaining tension becomes harder. Take breaks every 50 stitches or so to shake out your hands.
Make absolutely sure you have enough tail for large cast ons. Consider measuring twice and adding extra length. Running out after 150 stitches is heartbreaking.
Some knitters prefer to cast on half their stitches, then join new yarn and cast on the second half. This avoids the super long tail issue entirely. Just make sure to weave in those ends securely later.
Alternative Methods Worth Knowing
The Cable Cast On
This method creates a firmer, less stretchy edge. It’s great for buttonholes or when you need stability. You only use the working yarn, no long tail required.
The technique involves knitting into stitches and placing new ones back on the needle. It’s slower than the long tail method but very secure. Some patterns specifically call for it.
The Knitted Cast On
Similar to the cable cast on but slightly different. You knit into the stitch on the needle rather than between stitches. This creates a slightly looser edge.
It’s easier to learn than the long tail cast on for some people. The motion is simpler, and you don’t need to estimate tail length. However, the edge isn’t quite as polished.
When Provisional Makes Sense
Provisional cast ons are temporary. You’ll remove them later to work in the opposite direction or graft a seam. They’re essential for certain construction methods.
These involve waste yarn or a crochet chain. The actual working yarn sits on top of this temporary foundation. When you’re ready, you carefully remove the foundation and pick up live stitches.
Conclusion
The long tail cast on really is a knitting superpower once you master it. It works for so many projects and creates such a beautiful, professional edge. Yes, it takes some practice to get your tension consistent and your motions smooth.
But the investment is absolutely worth it. You’ll use this technique countless times in your knitting journey. From your first scarf to your tenth sweater, the long tail cast on delivers reliable results.
Start with good tail estimates, maintain even tension, and don’t rush the learning process. Give yourself permission to practice without the pressure of a real project. Before you know it, you’ll be casting on without even thinking about the individual steps.
Ready to try it out on your next project? Grab some yarn and needles, and give it a shot. The only way to truly learn is by doing.

FAQs
How much tail do I need for the long tail cast on?
Plan for about one inch of tail per stitch you’re casting on. For 50 stitches, leave 50 inches plus an extra 6 to 8 inches as a safety buffer. It’s always better to have too much than too little.
What if I run out of tail before finishing?
Unfortunately, you’ll need to pull out all your stitches and start over with a longer tail. There’s no way to add more yarn mid cast on with this method. Next time, be more generous with your estimate.
Can I use the long tail cast on for lace knitting?
While you can, it might be too firm for very delicate lace. Consider a more elastic cast on like the German twisted cast on for lace shawls. The long tail works fine for lace with less dramatic openwork though.
Why do my cast on stitches look twisted?
This usually means you’re not keeping the strands in the right position. The tail should always be on your thumb and the working yarn on your index finger. Make sure your needle goes up through the thumb loop first.
Is the long tail cast on the same as the continental cast on?
Yes, these are two names for the same technique. Some knitters also call it the double cast on. The method and results are identical regardless of which name you use.
How do I cast on in the middle of a row?
The long tail cast on doesn’t work well for adding stitches mid project. Use the cable cast on or knitted cast on instead when you need to add stitches for buttonholes or sleeves.
Can I use this method for circular knitting?
Absolutely! The long tail cast on works perfectly for circular needles or magic loop. Just be careful not to twist your cast on edge when you join to work in the round.
Why is my cast on edge too tight?
You’re probably pulling the tail too hard after each stitch. Ease up on your tension slightly. Some knitters also find using a needle one size larger for the cast on helps create a more relaxed edge.
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