7 Best Snap Fasteners For Cardigan Closures To Try
Upgrade your knitwear with these 7 top snap fasteners. From hidden magnetic closures to decorative metal buttons, find the best picks for a secure cardigan.
Choosing the right closure for a handmade cardigan is the final, critical step that determines whether your garment feels like a couture piece or a DIY project. After spending dozens of hours perfecting your gauge and blocking your wool, you need a fastener that respects the integrity of your stitches. The wrong choice can lead to sagging, pulled fibers, or a cluttered aesthetic that detracts from your hard work. This guide will help you navigate the hardware aisle with the same confidence you bring to picking a yarn weight.
Prym Sew-On Press Fasteners: The Reliable Classic
These are the gold standard for a reason, especially when you are working with delicate wools or luxury blends. Unlike hardware that requires piercing the fabric, these sew-on versions allow you to anchor the snap to the yarn structure without creating permanent holes.
They are particularly useful if you are prone to changing your mind about button placement. Because you attach them with thread, you can easily snip and reposition them if you find your cardigan is gaping at the bust after a few wears.
The trade-off here is time. You will need a needle and strong thread to secure them firmly, and you must ensure the thread tension is balanced so the snap doesn’t wobble.
Dritz Heavy-Duty Snaps: Best for Chunky Knits
When you’ve knit a heavy, oversized cardigan with bulky yarn, standard fasteners often fail to stay closed. Dritz heavy-duty snaps provide the extra tension needed to hold thick, lofty fabric together under the weight of its own drape.
These snaps usually require a specialized tool to set, which creates a mechanical grip on the knit. This is fantastic for durability, but be warned: once you set these, they are essentially permanent.
If you are using a superwash wool, which tends to be more elastic and "slippery," these snaps provide a secure anchor that won’t slide out of place. Just ensure you have reinforced the area well, or the weight of the snap might cause the knit fabric to sag over time.
KAM Plastic Snaps: Best for Lightweight Cardigans
Plastic snaps have revolutionized the way we finish lightweight garments like baby cardigans or summer cotton layering pieces. They are incredibly lightweight, meaning they won’t pull at your delicate stitches or cause the front bands to droop.
The biggest advantage is the sheer variety of colors available, allowing you to color-match your snaps perfectly to your yarn. This creates a seamless, professional look that makes the hardware feel like an intentional part of the design.
However, they do require a specific plier tool to install. While they are easy to use, they aren’t as strong as metal, so avoid using them on heavy, dense wool projects where the strain might cause the plastic to pop open.
Wuta Magnetic Snaps: Best for Hidden Closures
If you want a "floating" closure that keeps the front of your cardigan looking clean and uninterrupted, magnetic snaps are the answer. They are ideal for minimalist designs where you don’t want visible buttons or hardware breaking up the texture of your stitch pattern.
These snaps are usually sewn into the inside of the front bands, hidden between the facing and the main fabric. This keeps the metal away from your skin and prevents the hardware from catching on your jewelry or other clothing.
Be aware that these offer a "soft" closure. They are perfect for a draped, open-style cardigan, but they won’t hold up if you are trying to keep a tight-fitting garment securely shut while moving around.
YKK Metal Spring Snaps: Best for Durability
YKK is synonymous with high-quality hardware, and their spring snaps are engineered to last a lifetime. If you are knitting a "workhorse" cardigan meant to be worn daily, these are the most reliable option you can choose.
The spring mechanism provides a satisfying "click" and holds significantly better than standard friction-based snaps. They are robust, resilient, and unlikely to lose their grip even after hundreds of cycles of buttoning and unbuttoning.
Because they are metal, they add a bit of weight to the garment. Make sure your front band is knitted at a tighter gauge than the body to provide enough structural support to carry these heavier fasteners.
Singer Clear Snap Fasteners: Best for Visibility
Sometimes, the best fastener is the one you don’t see at all. Singer’s clear snaps are a fantastic solution for intricate lace or colorwork cardigans where any visible hardware would clash with your hard-earned patterns.
They are essentially invisible, making them perfect for projects where you want the focus to remain entirely on the yarn craft. They are also quite slim, which prevents the "bulge" that can occur when using metal snaps on thinner fabrics.
The drawback is that they are made of plastic and can be a bit harder to sew on securely. Use a double strand of high-quality polyester thread to ensure they stay attached to your project for the long haul.
Goldstar Metal Snaps: Best for Professional Finishes
Goldstar snaps are a favorite among makers who want a high-end, boutique look. They often come in sophisticated finishes like matte black, antique brass, or brushed nickel, elevating the overall aesthetic of your hand-knit.
They are exceptionally consistent in their manufacturing, meaning you won’t find yourself frustrated by a batch where half the snaps don’t close properly. This consistency is vital when you are working on a garment that represents many hours of labor.
Like other metal snaps, they require a setting tool. Always practice on a swatch of the same yarn and stitch pattern before committing to the actual garment to ensure the snap fits the thickness of your fabric perfectly.
How to Choose the Right Snap Size for Your Fabric
- Lightweight/Lace: Use small, 7mm–9mm snaps to avoid adding bulk.
- Worsted/DK Weight: 10mm–12mm snaps provide a balanced aesthetic and hold.
- Bulky/Chunky: 15mm+ snaps are necessary to handle the increased fabric thickness.
- Stitch Density: If your fabric is very open (like mohair), always use a larger backing to distribute the stress.
Essential Tools for Securing Snaps to Knitwear
You shouldn’t attempt to install hardware without the right equipment. For sew-on snaps, a sharp, sturdy sewing needle and nylon-coated thread are non-negotiable for durability. If you are using mechanical snaps, investing in a high-quality, dedicated snap press or plier tool will save you from ruined fabric and bent hardware. Never try to hammer a snap into place without the proper anvil, as you will almost certainly crush the snap or damage your knit.
Tips for Reinforcing Fabric Before Snap Placement
Even the best snap will eventually stretch out your knit if the fabric isn’t reinforced. Before installing, sew a small square of lightweight fusible interfacing or a scrap of non-stretch cotton ribbon to the back of the front band. This creates a stable "foundation" that prevents the snap from pulling through the yarn over time. This simple step is the difference between a cardigan that lasts for years and one that develops holes at the closure points after a single season.
Selecting the perfect snap is a balance between the weight of your yarn, the intended use of the garment, and your personal design aesthetic. By reinforcing your fabric and choosing the hardware that matches your tension, you ensure your hand-knit cardigan remains a functional staple in your wardrobe. Trust your instincts as a maker, take the time to swatch your hardware, and enjoy the satisfaction of a truly professional finish. Your stitches deserve a closure that is just as thoughtful as the knitting itself.
