Are Costco Sheets Actually Good? (2026 Bedding Quality Review)
Kirkland Signature sheets are worth comparing if you like cotton bedding. This review discusses the 680-thread-count Pima set; Costco also lists a separate 700-thread-count Supima set. They're not automatically the best or coolest sheets for every sleeper. Compare the exact size, fiber content, fitted-sheet pocket depth, set contents, stock and current checkout price against lighter percale or other sateen options; Yawnder has not documented a controlled long-term wash test of these brands.
680 Pima vs. Costco’s 700 Supima sheets
These are separate listings. Costco’s 680-thread-count Queen listing identifies California-grown Pima cotton and was out of stock when checked; stock varies by location. Costco also lists a 700-thread-count Supima cotton set, item 2071264. Do not assume every feature or result below for the 680 set applies to the 700.
For the 700 listing, Costco says the cotton is grown in the U.S. and the sheets are made in India, with fitted sheets for mattresses up to 18 inches deep. Its Full, Queen, King and Cal King sets list one flat sheet, one fitted sheet and four pillowcases; split sets list two fitted sheets. Verify availability, exact size, set contents and final price. Yawnder has not conducted a controlled side-by-side test of the 680 and 700 sets.
Costco listings checked November 9, 2026; availability may differ by location.
Quick answers
Are Kirkland Signature sheets good?
Costco has listed a 680-thread-count Pima set and now lists a separate 700-thread-count Supima set. Compare the exact product, pocket depth, price and availability; comfort and durability vary.
What kind of sheets does Costco sell?
Costco carries different bedding brands and constructions depending on location and season. Kirkland Signature 680-thread-count Pima cotton sateen is one commonly compared option, but availability, sizes and colors can change.
What are the best sheets at Costco?
There is no single best Costco sheet set for everyone. Kirkland 680-thread-count sateen suits shoppers who like a smooth substantial feel; people who sleep hot or want a crisper feel may prefer lighter cotton percale.
Are Costco 680 thread count sheets good?
They are worth considering for a smooth cotton sateen feel. Thread count by itself does not prove long-term durability, softness or cooling, so compare fabric, fit, care requirements and actual price.
2026 Buying Guide
This guide compares Costco’s Kirkland Signature sheets with Brooklinen and Boll & Branch using listed materials, construction, care guidance, and current product details.
Heads up: This post contains affiliate links, including Brooklinen. We may earn a commission at no extra cost to you.
Quick Summary
Costco’s Kirkland Signature sheets offer a Pima cotton option to compare with Brooklinen or Boll & Branch. The trade-offs? Fewer color choices, limited seasonal stock, and a slightly heavier sateen feel. Kirkland is worth comparing if you prefer cotton sateen. Long-term durability relative to those brands has not been established by a controlled Yawnder test.
Product Details and Testing Notes
Here are the details to compare across the three sets. This guide does not document a controlled side-by-side wear test.
- Kirkland Signature: Costco lists this set as 680-thread-count Pima cotton; Yawnder has not documented a long-term wash test. A heavier feel is a subjective impression, not a measured feature. The Grip-On corner design is a product feature, but actual fit depends on mattress height, elastic tension and laundering.
- Brooklinen Luxe Sateen: This guide does not document a firsthand test of the Brooklinen Luxe set. Compare the current product descriptions and care guidance for each exact set; this article does not report a controlled side-by-side wear test. How warm the set feels will depend on its fabric weight and the rest of the bedding; this article does not include a controlled heat comparison. Here’s their latest pricing.
- Boll & Branch Signature Hemmed: Signature Hemmed is an organic cotton sateen set, according to Boll & Branch. Compare its current price, sizes, and return terms with Costco before choosing.
Compare the sets by weave, fit, care, and current price; comfort is personal and this guide does not document a controlled comparison.
Comparison Table: Costco vs. Brooklinen vs. Boll & Branch
| Brand | Material | Weave / Feel | Thread Count | Price Range (Queen) | Notable Features | Verdict |
|---|---|---|---|---|---|---|
 Kirkland Signature (Costco) |
100% Pima Cotton | Sateen – smooth, slightly heavy | 680 | See Costco’s current listing; price and availability vary. | Grip-On corners, easy returns, long-staple cotton | Compare current price and set contents |
 Brooklinen Luxe Sateen |
100% Long-Staple Cotton | Sateen – ultra-smooth, drapey | 480 | See current listing | OEKO-TEX certified, deep pockets, 1-year warranty | Luxurious finish; slightly warmer feel |
 Boll & Branch Signature Hemmed |
100% Organic Long-Staple Cotton | Sateen - smooth finish | Check current listing | See current listing | Organic cotton; see current product listing | Organic cotton sateen; compare current price |
Prices and availability vary by size, retailer, location and promotion; check current listings before buying.
Construction & Fit
- Kirkland: The 680 Pima set uses a sateen weave; confirm the package’s fitted-sheet depth. Costco separately lists the 700 Supima fitted sheet as fitting mattresses up to 18 inches.
- Brooklinen: Luxe Sateen; double long-staple cotton, tighter weave, slightly shorter fit on extra-thick beds.
- Boll & Branch: Signature Hemmed uses organic cotton sateen, according to Boll & Branch.
Buying & Sales Notes
- Costco: Check current warehouse and online prices; promotions vary.
- Brooklinen: Frequent bundle discounts; best time to buy is during major holidays or anniversary sales.
- Boll & Branch: Check current promotions and exclusions before ordering.
Final Thoughts
Kirkland, Brooklinen and Boll & Branch offer cotton sheets at different prices and in different constructions. Compare the exact size, weave, care requirements and total cost. We have not established a durability or comfort winner through a controlled side-by-side test.
Choose based on your preferred feel, mattress depth, and the current price of the exact set.
Try Brooklinen Luxe Sateen Sheets as one cotton-sateen option. Compare it with Kirkland 680TC on identical sizes, fiber content, care requirements, delivered price and seller return terms.
Live pricing and current promotions on the mattresses, bases, and sleep tech we recommend.
Shop current dealsKirkland Signature Sheets: The Full Breakdown
Kirkland Signature is Costco's own label. The following breakdown concerns the 680-thread-count Pima cotton sateen set; Costco also lists a separate 700-thread-count Supima set discussed above. Compare specifications and current prices with other brands. For additional price comparisons, see California Design Den 400-thread-count cotton sateen queen sheets on Amazon or cotton percale alternatives. Compare fiber content, pocket depth and return terms rather than thread count alone. As an Amazon Associate, Yawnder earns from qualifying purchases.
| Spec | Kirkland Signature 680 TC | What it means in use |
|---|---|---|
| Fiber | Long-staple Pima cotton | Cotton feel and durability depend on the fabric and care; this guide does not include a controlled pilling comparison |
| Weave | Sateen | Silky and slightly warm — not the crisp, cool hand of percale |
| Thread count | 680 | Thread count alone does not establish comfort or durability; compare weave, feel, fit and care |
| Pocket depth | Fits up to ~18" | Snug on a 14" hybrid; tight over a mattress plus topper |
| Price (queen) | Check current warehouse or online price | Compare current prices and set contents |
Who Should Buy Them — And Who Shouldn't
Buy them if you want an all-cotton option and the current price suits your budget and you like a smooth, slightly warm sateen finish. Skip them if you specifically want the crisp feel of percale — some sateen sheets may feel warmer or more drapey than lightweight percale, depending on the fabric and sleeper. Compare the actual sets if you sleep hot.
Long-term durability depends on use and care; this guide does not document a controlled wash test. Follow the care instructions on the label.
Sleep hot? Compare lighter percale and other sheet options — start here instead.
Compare cooling sheet sets on saleWant to compare current availability and pricing on Amazon?
Compare value sheet sets on AmazonAs an Amazon Associate, Yawnder may earn from qualifying purchases.