Sequin yarn (also called glitter yarn) is a specialty yarn with small plastic, metallic, or holographic discs threaded directly onto the strand, so sparkle appears automatically as you knit or crochet — no separate sewing step required. It differs from plain "sparkle" or metallic yarns, which only have a shiny fiber woven in but no physical sequins. If you want visible, dimensional shine with minimal extra effort, sequin yarn is the right choice; if you want subtle shimmer without texture, a metallic-blend yarn is the better fit.
The rest of this guide covers how sequin yarn is made, how to choose the right type and hook size, which projects it suits best, and how to care for finished pieces so the sparkle lasts.
What Is Sequin Yarn, Exactly?
Sequin yarn is a base yarn — usually polyester, acrylic, or a cotton blend — with flat or domed sequins strung on at regular intervals during manufacturing. Each sequin has a tiny center hole, and the yarn passes through that hole, so the sequin sits flush against the strand instead of dangling loosely.
Sequin size typically ranges from 3mm to 12mm , and the sequin's center hole is usually about 1mm wide, which is the main factor limiting how thick a compatible base yarn can be. Some manufacturers now offer sequins with a larger 6mm hole specifically so they can be strung on chunkier yarns.
| Sequin Size | Best Yarn Weight | Typical Use |
|---|---|---|
| 3–5mm | Fingering / 4-ply | Delicate tops, shawls, lace accents |
| 6–7mm | DK / Sport | Scarves, bags, everyday accessories |
| 8–12mm | Worsted / Bulky | Statement garments, home décor, costumes |
Sequin Yarn vs. Glitter Yarn: What's the Difference?
"Glitter yarn" is often used loosely to describe anything shiny, but it typically falls into one of two distinct categories, and knowing which one you're buying prevents disappointment when the yarn arrives.
Sequin Yarn
Physical sequins are strung on the strand. The sparkle is three-dimensional, catches light from multiple angles, and is visible even in dim rooms. The tradeoff is a slightly stiffer hand-feel and a strand that needs more careful handling.
Metallic or Lurex-Blend Yarn
A thin metallic fiber (often called Lurex) is spun into the yarn itself. There's no added texture or thickness — the shine is flat and subtle, more of a soft glow than a sparkle. This type behaves almost exactly like standard yarn to work with.
If a listing says "sequin yarn," expect visible discs and extra bulk; if it says "sparkle" or "glitter" yarn without mentioning sequins, it's likely a metallic blend with a smoother feel. Always check the product description or a close-up photo before buying, since sellers use the terms inconsistently.
Choosing the Right Hook or Needle Size
Sequins add rigid bumps along an otherwise flexible strand, and standard hook or needle sizing recommendations don't fully account for that.
- Check the yarn label's suggested hook or needle size first, then size up by 0.5–1mm to give sequins room to pass through stitches without snagging.
- For a common fingering-weight sequin yarn with 1mm sequin holes, a 3mm crochet hook is a widely recommended starting point, even though a plain fingering yarn would normally pair with a 2.25–3.25mm hook.
- For knitting, metal or brass needles glide past sequins more smoothly than wood or bamboo, which can catch on the discs' edges.
- Always crochet or knit a small swatch first — sequin placement can shift your gauge more than fiber content alone would predict.
Techniques for Working with Sequin Yarn
Two approaches dominate: crocheting or knitting directly with pre-sequined yarn, or stringing your own sequins onto plain yarn for full control over placement.
Working with Pre-Strung Sequin Yarn
Because the sequins are already on the strand, you crochet or knit as you normally would, but two habits make a noticeable difference. First, work more slowly than usual near each sequin so it has time to slide into position rather than getting crushed under the hook. Second, keep tension even — pulling too tight can pop a sequin sideways, while working too loose lets sequins flip and show their dull backside.
Stringing Your Own Sequins
Thread sequins onto plain yarn using a large-eye needle before you begin, then push a sequin up to the working area only on the rows where you want it. A common beginner practice project strings around 30 sequins onto worsted-weight yarn and places one every other stitch on wrong-side rows, so the sparkle appears on the right side of the fabric. This method takes more prep time but gives complete control over density and pattern.
Sewing Sequins onto Finished Fabric
For accent placement rather than all-over sparkle, complete the crochet or knit piece first, then hand-sew individual sequins on afterward with matching thread. A single stitch through the center hole holds small sequins in place; larger ones benefit from a second stitch for stability.
Best Projects for Sequin and Glitter Yarn
Sequin yarn works best in projects where the sparkle is meant to be seen up close or where the added stiffness from the sequins doesn't interfere with drape.
- Evening and occasion wear — shawls, wraps, and shrugs where a little structure looks intentional
- Summer tops and cover-ups — lightweight sequin yarns in polyester blends are breathable and suit mesh or open-stitch patterns
- Accessories — headbands, scarves, and small bags, where stiffness from sequins is barely noticeable
- Festive and costume pieces — holiday décor, dance costumes, and festival outfits that call for maximum shine
- Accent trim — cuffs, hemlines, or edging on an otherwise plain garment, using sequin yarn sparingly rather than throughout
Sequin yarn is generally a poor match for close-fitting garments meant to be worn against bare skin for long periods, tight cabled or textured stitch patterns where sequins get lost, and anything requiring frequent machine washing, since agitation is the leading cause of sequins detaching over time.
Caring for Finished Sequin Yarn Projects
Sequin-embellished pieces need gentler handling than plain acrylic or wool projects, mainly to protect the thread or yarn holding each sequin in place.
| Care Step | Recommendation |
|---|---|
| Washing | Hand wash cold, or use a mesh laundry bag on a delicate cycle |
| Drying | Lay flat; never tumble dry, as heat can warp plastic sequins |
| Ironing | Avoid direct heat on sequins; iron the reverse side only if needed |
| Storage | Fold loosely; avoid hanging, which can stress stitches holding sequins |
| Loose sequins | Re-secure promptly with matching thread before more come loose nearby |
A small dab of clear-drying fabric glue or a fabric sealant on the back of loose or edge sequins can add extra hold, particularly on pieces that will see frequent wear, such as bags or dance costumes.
Common Problems and How to Fix Them
Most frustrations with sequin yarn trace back to a handful of predictable causes.
- Sequins catching on the hook or needle — size up your hook or needle by 0.5–1mm and slow down as you approach each sequin
- Sequins flipping to show their dull side — slightly loosen tension so sequins have room to settle flat rather than being forced sideways
- Sequins falling off after washing — switch to hand washing and cold water, and reinforce any loose sequins with a stitch of matching thread beforehand
- Yarn feels stiff or scratchy against skin — line the inside of wearable pieces with a soft cotton or silk lining, or reserve sequin yarn for outerwear and accessories rather than base layers
- Uneven gauge compared to the pattern — always swatch first, since sequin placement affects drape and stitch height more than fiber content alone
Frequently Asked Questions
Is sequin yarn hard to work with as a beginner?
It's more forgiving than it looks. Simple stitches like single or double crochet and basic knit/purl work well; the main adjustment is going slightly slower and sizing up your hook or needle.
Can sequin yarn be used on a knitting machine?
Generally not recommended. The rigid sequins tend to jam machine needles and carriage mechanisms, so sequin yarn is almost exclusively worked by hand.
Does sequin yarn come in different sequin shapes?
Yes. Beyond standard round discs, sequins are also available in domed, hologram, matte, and novelty shapes like stars or hearts, each producing a different light-catching effect.
Is sequin yarn itchy to wear?
Most sequin yarns use a soft polyester or cotton-blend base and are not itchy, though the sequins themselves add a slight stiffness rather than softness against skin.
