The best serger thread for most people is spun polyester in Tex 27 (40s/2) on large cones. Maxi-Lock by American & Efird is the long-standing favorite; New brothread's 4-cone packs are Amazon's #1 seller in Serger Thread. Start with white, black and a neutral grey or beige.
Quick picks
| Best overall | Maxi-Lock all-purpose 4-pack | Amazon |
|---|---|---|
| Best seller | New brothread 4 large cones | Amazon |
| Most yards per pack | AK Trading 4-pack cones | Amazon |
| Best neutral starter set | BBTO 6 neutral cones | Amazon |
| Most colors | 12-cone color set | Amazon |
| Best bulk black and white | Tortoise 8 cones, black and white | Amazon |
| Best decorative | Rainbow variegated serger thread | Amazon |
How we picked
- Fiber and weight stated in the listing: we favored spun polyester described as Tex 27 or 40s/2, the standard serger weight.
- Cone size: yards per cone and per pack.
- Sales and ratings on Amazon, October 3, 2026, including the Serger Thread category rank.
- Color range, because you'll want to reorder the same color.
This is a spec review: we compared listings and owner ratings; we didn't run these threads through a serger ourselves. How we research.
Serger thread basics
| Question | Short answer |
|---|---|
| Fiber | Spun polyester: strong, slightly stretchy, low lint, doesn't shrink |
| Weight | Tex 27 / 40s/2 for seams and edge finishing |
| Put-up | Cones (cross-wound), 1,800 to 6,000 yards each in the packs below |
| How many | 4 cones for a 4-thread serger, 3 for a 3-thread |
| Rolled hems and soft knit seams | Many sewists use woolly nylon in the upper looper (and sometimes the lower) for fuller coverage and stretch |
| Decorative edges | Variegated or heavier decorative threads in the loopers |
Why cones? A serger sews fast and uses a lot of thread: each overlock stitch wraps two looper threads around the edge. Small spools empty quickly and don't unwind smoothly off the vertical spool pins. Cones are cross-wound to feed off the top.
Serger thread vs regular thread
The difference is mostly packaging, not chemistry. "Serger thread" and "all-purpose" thread in this comparison are both spun polyester, and several packs below are sold for sergers, sewing machines and quilting alike. What makes serger thread different in practice:
- Cones instead of spools. Cross-wound cones feed smoothly off the top at high speed and hold thousands of yards.
- Sold in matching sets. Packs of four identical cones suit a 4-thread serger.
- Often slightly finer or lighter-finish. Some brands make dedicated serger thread a touch lighter than their sewing thread, because the overlock stitch uses so many strands. The packs here state Tex 27 / 40s/2 where they give a weight.
You can put serger cones on your sewing machine too, using a separate cone stand, which makes them good value for long quilting and topstitching jobs. The reverse also works: an ordinary spool of all-purpose polyester will serge fine for a small project, with a spool cap to stop it wobbling.
Which thread goes where
This is how you avoid buying four cones of every color: keep four cones each of white, black and grey, and buy matching colors only for the needle threads when a seam will show.
The best serger thread packs
Maxi-Lock all-purpose 4-pack
Maxi-Lock is the serger thread many sewists already know by name. This value pack has four 3,000-yard cones of spun polyester, which the listing describes as ideal for overlock sewing on light to medium fabrics and for standard and blind-stitch hems. A separate Maxi-Lock listing describes the same cones as Tex 27, 100% polyester, mildew, UV, shrink and abrasion resistant.
- MakerAmerican & Efird
- Fiberspun polyester
- Cones4 x 3,000 yd
- Colorssold by color
- Rating4.8
Why it stands out
- Trusted, consistent brand
- 4.8-star average from 660+ ratings
- Four matching cones for a 4-thread serger
Think twice if
- 3,000 yards per cone is less than some value packs
New brothread 4 large cones
On October 3, 2026, this was #1 in Amazon's Serger Thread category, with 300+ bought in the past month and 5,400+ ratings. Each pack has four 5,500-yard cones of Tex 27 spun polyester in one of 28 colors, and the seller publishes a conversion to Coats colors so you can match patterns' thread recommendations.
- Fiber100% spun polyester
- Weight40S/2 (Tex 27)
- Cones4 x 5,500 yd
- Colors28
- Rank#1 in Serger Thread
Why it stands out
- Huge cones: 22,000 yards per pack
- 28 colors with a Coats color conversion
- Most-rated serger thread here
Think twice if
- Large cones may need a separate thread stand on some machines
AK Trading 4-pack cones
The biggest cones in our comparison: 6,000 yards each, 24,000 yards per pack, in more than 30 colors. It was the best-selling cone pack in our serger thread search with 800+ bought in the past month and 2,900+ ratings. The listing describes it as high-tensile, low-lint spun polyester.
- Fiber100% spun polyester
- Weight40
- Cones4 x 6,000 yd
- Colors30+
- Bought800+ in past month
Why it stands out
- 24,000 yards per pack
- 30+ colors, sold four of a kind
Think twice if
- Listing gives "40 weight" rather than a Tex number
BBTO 6 neutral cones
One cone each of the six neutrals that cover most serging: white, black, beige, grey, dark grey and coffee. Ideal for the "neutral loopers, matching needles" approach, or for a 3-thread serger. 4.7 stars from nearly 500 ratings.
- Fiberspun polyester
- Cones6 x 3,000 yd
- Colorswhite, black, beige, grey, dark grey, coffee
Why it stands out
- Six useful neutrals in one pack
- 3,000 yards per cone
Think twice if
- Only one cone per color, so you'll need more for matching 4-thread seams
12-cone color set
Twelve colors of Tex 27 spun polyester, 1,800 yards each. The cones are smaller, but it's the easiest way to have a needle-thread match on hand for most fabrics. 300+ bought in the past month.
- Fiber100% spun polyester
- Weight40S/2 (Tex 27)
- Cones12 x 1,800 yd
- Colors12
Why it stands out
- Twelve colors at once
- Tex 27 weight stated
Think twice if
- Smaller cones run out sooner
Tortoise 8 cones, black and white
Eight 3,000-yard cones split between black and white: two full 4-thread setups in the colors you'll use most. The listing quotes color fastness and breaking-strength figures and a 12-month warranty. 4.7 stars from 2,000+ ratings.
- Fiber100% polyester
- Weight40S/2
- Cones8 x 3,000 yd
- Colorswhite + black
Why it stands out
- Two complete 4-cone sets
- Detailed quality specs in the listing
Think twice if
- Only black and white
Rainbow variegated serger thread
For decorative rolled hems and exposed edges on blankets, scarves and kids' clothes, variegated thread does the color changes for you. Four 3,000-yard cones, 4.7 stars from 1,600+ ratings.
- Fiber100% spun polyester
- Weight40S/2 (Tex 27)
- Cones4 x 3,000 yd
- Colorsrainbow variegated
Why it stands out
- Instant decorative edges
- Standard Tex 27 weight
Think twice if
- Not for seams you want to disappear
Side-by-side comparison
| Pack | Cones x yards | Total yards | Weight stated | Rating |
|---|---|---|---|---|
| Maxi-Lock 4-pack | 4 x 3,000 | 12,000 | Tex 27 (other listing) | 4.8 |
| New brothread 4 cones | 4 x 5,500 | 22,000 | Tex 27 | 4.7 |
| AK Trading 4-pack | 4 x 6,000 | 24,000 | "40 weight" | 4.6 |
| BBTO 6 neutrals | 6 x 3,000 | 18,000 | Not stated | 4.7 |
| 12-cone color set | 12 x 1,800 | 21,600 | Tex 27 | 4.7 |
| Tortoise 8 cones | 8 x 3,000 | 24,000 | 40S/2 | 4.7 |
| Rainbow variegated | 4 x 3,000 | 12,000 | Tex 27 | 4.7 |
Which colors to buy first
- White for light fabrics.
- Black for dark fabrics.
- Mid-grey, which disappears on a surprising range of medium colors and prints.
- Beige or cream for warm light tones and natural linens.
- Navy, if you sew a lot of denim and dark blues.
Buy four of white and black (for full matching sets) and singles of the rest for needle threads.
Tips that save thread and frustration
- Change colors by tying on. Cut each old thread at the cone, tie the new color on, and pull the knots through the paths. It's faster than rethreading.
- Use cone adapters (many sergers include them; the Singer S0100 listing does, for example) so cones sit steadily on the spool pins.
- For oversized cones, a free-standing stand like the Sew Tech adjustable cone thread stand (2,000+ ratings) feeds thread smoothly from a cone that won't fit on the machine.
- Store cones out of sunlight and dust; covered bins are fine.
- Check your needle type. Many home sergers use standard household needles, while some take ELx705 serger needles. Your manual will say.
The bottom line
For dependable serger thread, buy Maxi-Lock cones in white, black and grey. For the most thread for your money, New brothread's 5,500-yard cones and AK Trading's 6,000-yard cones are the value picks. Still choosing a serger? See the best serger for beginners.
Specs come from each Amazon listing, checked October 3, 2026. Prices change often, so the buttons above show the current price on Amazon. How we research · Affiliate disclosure