6 Best Button Fasteners For Cardigan Finishing Pros
Elevate your knitwear with these 6 top-tier button fasteners. Learn which options offer the best durability and aesthetic finish for professional cardigans.
Finishing a cardigan is the final, high-stakes hurdle that transforms a pile of knitted fabric into a wardrobe staple you will actually wear. The choice of fastener does more than hold the garment shut; it dictates the drape, the structural integrity of the button band, and the overall aesthetic longevity of your work. Getting this right requires balancing the weight of your yarn with the mechanics of the hardware. Here is how to select the perfect closure for your next heirloom piece.
Dritz Heavy Duty Snaps: Best for Modern Cardigans
When you want a clean, minimalist look without the bulk of traditional buttons, heavy-duty snaps are your best friend. They offer a sleek, industrial finish that pairs perfectly with modern, boxy silhouettes or fine-gauge merino cardigans.
Unlike buttons that require buttonholes, these snaps allow the fabric to overlap seamlessly. This is a massive advantage if you’ve struggled with buttonhole tension or if you’re working with a stitch pattern that doesn’t lend itself to vertical openings.
Keep in mind that these require a dedicated setting tool to ensure they stay put. If you don’t secure them through a reinforced patch of fabric, the metal can eventually pull through delicate fibers.
La Mode Shank Buttons: Classic Choice for Knits
Shank buttons are the gold standard for knitwear because they provide the necessary "room" for the fabric to sit neatly behind the button. When you use a flat button on a thick wool cardigan, the fabric often bunches or puckers, which ruins the line of your button band.
Because the shank lifts the button away from the fabric, the button band can slide underneath it without distorting the stitches. This is vital for bulky sweaters where the depth of the fabric is significant.
I always recommend checking the shank hole size before you start. If you’re using a heavy-weight wool, ensure the shank is long enough to accommodate the thickness of both the button band and the overlapping front panel.
Prym Toggle Closures: Best for Chunky Wool Coats
Toggles are the heavy lifters of the knitting world. They are ideal for oversized, chunky wool cardigans where a standard button would simply be too small to hold the weight of the fabric securely.
Because they create a loop-and-toggle system, they don’t put localized stress on a single point of the fabric. This distributes the tension across a wider area, which is essential when working with heavy, loosely spun yarns that might otherwise stretch out of shape.
Be aware that toggles add a distinct "outdoor" aesthetic to a garment. They aren’t the right choice for a delicate lace cardigan, but for a sturdy, rustic piece meant for layering, they are functionally superior.
JHB International Wood Buttons: Natural Aesthetics
Wood buttons bring an organic, grounded feel to hand-knitted garments. They pair beautifully with wool, alpaca, and plant-based fibers like cotton or linen, enhancing the "handmade" quality of your project.
Because wood is porous and lightweight, it won’t weigh down a delicate button band. However, you must be careful with washing; untreated wood can sometimes bleed color or swell when soaked.
Always check if the buttons are sealed or varnished. If they aren’t, consider giving them a light coat of clear wax or simply remove them before tossing your sweater in for a soak.
ButtonMode Resin Buttons: Best for Color Variety
Resin buttons are incredibly versatile because they can mimic the look of horn, shell, or stone while being far more durable and affordable. If you have spent weeks dyeing your own yarn to a specific custom shade, resin buttons often provide the best color-matching options.
These buttons are practically indestructible, making them a smart choice for cardigans that will see heavy, daily use. They don’t crack like shell or fade like wood, ensuring your hard work stays looking fresh for years.
The only downside is that they can feel a bit "plastic" against high-end fibers like cashmere or silk. If you’re using luxury yarn, spend the extra time to find a resin button with a high-quality, matte finish that doesn’t look cheap.
Koh-I-Noor Snap Fasteners: Best for Hidden Closures
Sometimes the best fastener is the one you don’t see. Koh-I-Noor snaps are excellent for creating a hidden closure on a cardigan where you want the focus to remain entirely on the texture or stitch pattern of the knit.
These are particularly useful for cardigans with intricate cables or lace where a visible button might disrupt the flow of the design. They provide a secure closure that keeps the edges of the band perfectly aligned.
Because they are small and unobtrusive, they work best on lightweight to mid-weight fabrics. On a very heavy wool, they might pop open under tension, so use them in conjunction with a decorative brooch if you need extra security.
Choosing the Right Button Size for Your Knitwear
The golden rule is to match the button size to the weight of your yarn and the width of your button band. A button that is too large will overwhelm your stitches, while one that is too small will constantly pop out of the buttonhole.
- Fingering weight: 10mm to 15mm buttons.
- DK/Worsted weight: 18mm to 22mm buttons.
- Bulky/Chunky weight: 25mm to 30mm+ buttons.
Always test your button through the buttonhole before sewing it on. It should slide through with slight resistance; if it falls through on its own, it’s too small, and if you have to force it, you’ll eventually stretch the buttonhole out of shape.
How to Reinforce Button Bands for Heavy Buttons
If you’re working with heavy buttons or a stretchy yarn, your button band will inevitably sag over time. To prevent this, I always recommend sewing a strip of grosgrain ribbon or a thin piece of non-stretch tape behind the button band.
This creates a stable "anchor" for your buttons and prevents the weight of the closure from pulling on the individual knitted stitches. It’s a simple step that adds professional-level longevity to your garment.
When attaching the ribbon, use a whip stitch to secure it to the back of the band. Make sure the ribbon is slightly shorter than the band itself, as this will help keep the edge from curling or rippling.
Essential Tools for Professional Button Attachment
Beyond just a needle and thread, having the right kit makes the job much easier. A sharp, sturdy tapestry needle is non-negotiable for weaving in ends, but for buttons, you want a slightly thinner, stronger sewing needle.
I also swear by using a "button spacer"—a simple toothpick or a thick knitting needle—placed between the button and the fabric while sewing. This creates a temporary shank, ensuring there is enough thread to allow for the thickness of the fabric.
Don’t forget a good pair of embroidery scissors for clean thread cuts. A clean finish on the inside of the button band is the hallmark of an expert knitter.
Troubleshooting Stretched Buttonholes in Cardigans
Stretched buttonholes are the most common complaint I hear from knitters. If your buttonholes have grown over time, you can easily tighten them up by working a blanket stitch around the perimeter of the hole using a matching thread.
This not only reinforces the edge but also shrinks the opening back to its original size. It’s a subtle fix that looks intentional and adds a bit of extra security to the garment.
If the buttonhole is beyond saving, you can sew the hole shut and move the button to a new position, or simply sew a decorative button over the spot and use a snap underneath for the actual closure. Don’t let a stretched hole ruin a sweater you’ve spent dozens of hours on!
Selecting the right fastener is the final act of love for your hand-knitted cardigan. Whether you choose the industrial strength of a snap or the classic charm of a wooden button, ensure the hardware complements the weight and intention of your yarn. Take your time with the reinforcement, and your garment will remain a staple in your rotation for years to come. Happy finishing!
