Theory Women's Sale

Theory's cashmere is genuinely good and the rest of the line is well-constructed for the price point — secondhand, it becomes a very reasonable proposition. The tailoring travels and stores well, and the minimalist aesthetic means pieces from several seasons ago don't look dated.

Shop 27 Theory deals in our collection. Priced an average of 79% off estimated retail.

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Theory Lewie Dress Womens S Black Silk Crew Neck Sleeveless Tank Maxi Lined

100.0% · 6,612 ratings +$8 shipping Listed 15d ago

Theory's silk-tank maxi cut in a crew neck that reads office-to-evening, recently listed at a price that undercuts where the brand's dresses usually settle.

10.0 /10

Theory $65 $345–$445$445(84% Off Est. Retail84% Off Est Retail)

Theory Nyma Coat Light Grey Wool Cashmere Blend Women's Size Small

99.4% · 188 ratings +$10 shipping Listed 19d ago

Theory's Nyma coat in wool-cashmere -- a mainline cut that moves quickly when priced right, yet this one sits more than a week without comparable sales to anchor it.

10.0 /10

Theory $92 $595–$795$795(87% Off Est. Retail87% Off Est Retail)

Theory Eco Crunch Scoop Neck Sleeveless Midi Dress Black XL

100.0% · 237 ratings +$10 shipping Listed 1 month ago

Theory's Eco Crunch fabric -- a textured weave that reads as workwear but wears like a uniform -- in a cut that sits between office and evening.

10.0 /10

Theory $75 $295–$395$395(78% Off Est. Retail78% Off Est Retail)

Theory Nyma Coat Double Face Wool Heather Gray Women's Size Small

100.0% · 9,675 ratings +$10 shipping Listed 29d ago

Theory's double-face wool construction—no lining, no seams, just two fused layers of cloth that became the quiet reference point for elevated outerwear in the mid-2010s office wardrobe.

10.0 /10

Theory $130 $495–$695$695(78% Off Est. Retail78% Off Est Retail)

Theory Women's Wool Coat - Small

+$18 shipping Listed 19 months ago

Theory's wool outerwear is the quiet standard for Manhattan tailoring—this one's been waiting, likely because buyers who know the brand can afford to wait for excellent shape.

10.0 /10

Theory $165 $595(72% Off Est. Retail72% Off Est Retail)

$698 Theory Black Wool Coralia Dress Coat Medium - Worn 2x. Downsizing Closet!!

100.0% · 2,395 ratings +$20 shipping Listed 32 months ago

Theory's Coralia coat runs slim through the shoulders—size up if you plan to layer over a blazer.

10.0 /10

Theory $150 $695–$795$795(80% Off Est. Retail80% Off Est Retail)

Theory Black Trench Coat Rain Coat Excellent Used Size S

100.0% · 536 ratings +$18 shipping Listed 44 months ago

Theory's wool-blend trench in the slim-shouldered cut that doesn't appear often enough to establish a pattern, sitting for years where demand seems softer than the brand's reputation for understated workwear would suggest.

10.0 /10

Theory $149 $395–$525$525(68% Off Est. Retail68% Off Est Retail)

Theory Coat Size Small Cropped Puffer Purple

100.0% · 212 ratings Free shipping Listed 40 months ago

Theory's cropped puffer in saturated purple—years of visibility in a category where most outerwear moves faster suggests this particular cut and colorway never found its match.

10.0 /10

Theory $136 $595(77% Off Est. Retail77% Off Est Retail)

THEORY black double breasted coat with ribbed knit zip up collar SZ L

99.7% · 31,648 ratings Free shipping Listed 90 months ago

Theory's ribbed knit zip-up collar—a construction that turns the coat into a high-necked shell when fully closed—here in a wool outerwear piece that doesn't surface used often, with years of sitting suggesting the silhouette asks more of its buyer than casual browsers expect.

10.0 /10

Theory $120 $595–$895$895(84% Off Est. Retail84% Off Est Retail)

Theory Gray Sleeveless Sheath Dress Geometric Knee Length Size 10

100.0% · 14 ratings Free shipping Listed 3 months ago

Theory's stretch-wool sheath—the cut that built the brand's reputation on boardroom tailoring—here with a couple weeks of seller patience already behind it.

7.0 /10

Theory $60 $295–$345$345(81% Off Est. Retail81% Off Est Retail)

Theory Leopard Print Silk Georgette Asymmetrical Maxi Slip Dress Sz 2 Fairygrung

99.8% · 3,129 ratings Free shipping Listed 8 months ago

Theory's bias-cut slips run long—this asymmetrical hem will skim the ankle on anyone under 5'6", and the leopard silk georgette is a niche the brand executed precisely but few shoppers search for.

7.0 /10

Theory $70 $395–$445$445(83% Off Est. Retail83% Off Est Retail)

Theory Deep Green Women's Size S WINTER COAT with Removable Hood.

100.0% · 240 ratings +$15 shipping Listed 8 months ago

Theory's removable-hood coats in this condition usually move faster—four months on the rack in a category this size suggests the right buyer simply hasn't looked yet.

7.0 /10

Theory $100 $495–$595$595(82% Off Est. Retail82% Off Est Retail)

Theory Wool City Single Button Blazer Jacker Size 4

100.0% · 335 ratings +$9 shipping Listed 6 months ago

Theory's City blazer—the cut that made the brand the reference point for modern workwear—here where two months without a sale has pulled the ask below where these wool staples usually change hands.

7.0 /10

Theory $60 $395–$425$425(85% Off Est. Retail85% Off Est Retail)

Theory Women Black Long Duster Long Trench Peacoat Preppy Wool Luxury Minimal M

99.3% · 4,382 ratings +$11 shipping Listed 6 months ago

Theory's long duster—the cut that made them the go-to for pared-back professional dressing—here in a length and fabric weight that rarely turns up outside full retail.

7.0 /10

Theory $99 $595–$695$695(85% Off Est. Retail85% Off Est Retail)

Theory Boy Coat in Buffalo Check Double-Face Wool Cashmere Grey White size P XS

100.0% · 687 ratings +$10 shipping Listed 5 months ago

Theory's size P runs a full size small in the shoulders—this fits like a 0, not a 2—so the usual audience has passed it by.

7.0 /10

Theory $125 $695–$795$795(83% Off Est. Retail83% Off Est Retail)

Theory Apalia Dress 8 Black White Zip Front A-Line Short Sleeve Zip Pockets

99.4% · 774 ratings +$9 shipping Listed 1 month ago

Theory's zip-front A-line in a weave more considered than their standard jersey — on the market for a brand whose resale following never matched its retail footprint.

6.0 /10

Theory $51 $345–$425$425(87% Off Est. Retail87% Off Est Retail)

Theory Dress Womens 2 Black Geometric Jacquard Sheath Half Sleeve Knee Length

99.9% · 3,394 ratings +$9 shipping Listed 2 months ago

Theory's jacquard sheath is what the brand built its reputation on—structured office dressing that reads intentional rather than basic, a reference point other labels still imitate.

6.0 /10

Theory $52 $395–$495$495(88% Off Est. Retail88% Off Est Retail)

THEORY • Womens Black Wool Cashmere Long Pea Coat Overcoat Pockets Twill • Small

100.0% · 979 ratings +$15 shipping Listed 2 months ago

Theory's wool-cashmere pea coat—the fabric that usually stiffens off the rack and softens only with wear—here where the shoulders may have relaxed from hanging, a fit detail most buyers miss.

6.0 /10

Theory $90 $595–$795$795(87% Off Est. Retail87% Off Est Retail)

Theory Puffer Coat Womens Medium Black Quilted Double Breasted Mid Length

99.9% · 6,285 ratings +$10 shipping Listed 4 months ago

Theory's tight-quilted down keeps its fill from shifting — months without movement have pulled the ask toward the brand's plainer wool styles.

6.0 /10

Theory $114 $425–$475$475(75% Off Est. Retail75% Off Est Retail)

Theory Black Jersey Knit Short Sleeve Little Black Dress Size XS ( 0 - 2) EUC

98.0% · 1,548 ratings +$9 shipping Listed 11 months ago

Theory's jersey shift, seven months on the market — the ask has drifted toward where contemporary basics start rather than where this brand clears.

6.0 /10

Theory $60 $225–$275$275(76% Off Est. Retail76% Off Est Retail)

THEORY Double Faced Wool Buffalo Plaid Coat | | Camel Check Oversize XS

100.0% · 57 ratings Free shipping Listed 8 months ago

A mainline Theory buffalo-plaid overcoat sitting just under the low end of where these typically move on resale.

6.0 /10

Theory $129 $595–$695$695(80% Off Est. Retail80% Off Est Retail)

Theory Wool/Angora Coat "Yuriana" Size S Excellent Condition

+$10 shipping Listed 19 months ago

Theory's Yuriana cut—the narrow-shouldered silhouette that became their signature for refined, office-appropriate outerwear—here in the wool-angora blend that built their reputation for coats that read far more expensive than their price point.

6.0 /10

Theory $119 $595–$695$695(82% Off Est. Retail82% Off Est Retail)

Theory Women's Good Wool Eano Sheath Dress Size 6 Dark Cement

100.0% · 180 ratings Free shipping Listed 15 months ago

Theory's Good Wool sheath—the cut that defined early-aughts office dressing—here where the specific color name keeps it from buyers who search the label.

6.0 /10

Theory $69 $395–$425$425(83% Off Est. Retail83% Off Est Retail)

Theory Women's 100% Silk Shift Dress Size 6 Black Long Puff Sleeve Sz P

100.0% · 500 ratings +$9 shipping Listed 13 months ago

Theory's silk shift is the cut that made the brand the reference point for office-to-evening minimalism—here in the puff-sleeve variation that reads more statement than standard.

6.0 /10

Theory $60 $295–$345$345(81% Off Est. Retail81% Off Est Retail)

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Buying Secondhand Theory Women's: What to Look For

Theory is one of the more sensible secondhand buys in the contemporary market, mostly because the brand names its fabrics and those names appear on the interior label. Once you know what Admiral crepe, Approach, and Bistretch mean, you can filter out the unremarkable pieces and find the ones that justify the original price. The secondary market tends to treat all Theory the same, which is the buyer's advantage.

Theory Approach and Bistretch Pants: Are They Worth Buying Used?

The Approach pant and the Bistretch Slim are the items most worth finding at secondhand prices. Both fabrics hold their structure well and resist wrinkling in a way that cheaper poly-wool blends don't, which is why they've been near-constant in Theory's line for years. The main thing to check on used pairs is sheen at the seat and inner thigh — the bi-stretch fabrics can develop a worn shine with heavy use that's visible in good light. Ask sellers to photograph under direct light if the listing photos are soft. Inseam availability is the other practical reason to buy secondhand: Theory runs specific inseams that sell out fast at retail, and the secondary market often has better selection.

Theory Admiral Crepe Blazers: Fabric Name Is Everything

Theory's blazers vary more than the pants do, and the fabric name is what separates a good buy from a forgettable one. Admiral crepe is their best suiting fabric — a dense, matte material that doesn't wrinkle badly, reads more expensive than the price suggests, and has been used consistently enough that you'll find it across multiple seasons. Listings rarely call it out, so it's worth checking the interior label before buying or messaging the seller to ask. On sizing: Theory shifted their blazer fit noticeably around 2018, moving toward a slightly shorter, more cropped silhouette. Pre-2018 pieces tend to have a longer body and slightly more relaxed shoulder.

Theory Knits and Regal Wool: What to Avoid and What to Look For

Theory's knit program is inconsistent in a way the pants and blazers aren't. Their cashmere and Regal Wool pieces are worth buying — the Regal Wool label in particular signals a denser, more pill-resistant blend than their entry-level options. The cheaper merino and cotton blends pill fast and often show it clearly in listing photos if you zoom in. For any knit, look closely at the cuffs, collar edges, and underarm area in photos. Pilling in those spots is normal and can be addressed with a fabric shaver; pilling across the body of the garment is harder to justify. Turtlenecks and fitted crewnecks in the better wool blends have held up well secondhand and are consistently underpriced relative to what they cost new.

Secondhand Theory Questions

Does Theory run small or large?

It depends on the era and category. Post-2018 Theory blazers run slightly shorter and more cropped than older pieces, but the numerical sizing has stayed fairly consistent. In pants, Theory tends to run true to size in the waist but short in the inseam for taller buyers — a common complaint is that even the 'long' inseam (around 32 inches) isn't long enough. If you're between sizes in a blazer, the current-era fit skews toward a snugger shoulder, so sizing up is reasonable.

How do I know if a Theory piece is worth the secondhand price?

Check the interior label for the fabric name. Admiral crepe, Approach, Bistretch, and Regal Wool are the fabrics worth buying. If the label says something generic like 'stretch wool' or lists a high percentage of polyester without a branded fabric name, the piece is from the lower tier of the line and the secondhand price should reflect that. Theory pieces in the better fabrics at $60-120 used are good value; the same price for a basic stretch blend is not.

What condition issues are most common on used Theory clothing?

Pilling on knits is the most common issue, especially on the cheaper wool and cotton blends. On pants and blazers, watch for sheen at high-wear points (seat, inner thigh, elbows) — this is harder to fix than pilling. Lining tears at the sleeve hem are fairly common on blazers and are a minor repair if the outer fabric is sound. Fabric content misrepresentation in listings is common enough that confirming the label is worth doing.

Is Theory a better secondhand buy than Vince or Rag & Bone?

For structured pieces like blazers and tailored pants, Theory is the stronger buy. Their house fabrics (particularly Admiral crepe and Approach) are more purpose-built for workwear than Vince's softer, more casual fabrications. Vince is better for knitwear and relaxed trousers. Rag & Bone is closer competition on blazers and has stronger denim, but Theory's pants in Bistretch or Precision fabric are hard to match at the secondhand price point.

Where can I buy pre-owned Theory womenswear?

Right here — this page collects pre-owned and secondhand Theory womenswear from live eBay listings, scored against current market pricing so the resale deals worth acting on sort to the top. Stock turns over daily as pieces sell.

Theory Women's Sale

No deals match your filters.

Buying Secondhand Theory Women's: What to Look For

Theory Approach and Bistretch Pants: Are They Worth Buying Used?

Theory Admiral Crepe Blazers: Fabric Name Is Everything

Theory Knits and Regal Wool: What to Avoid and What to Look For

Secondhand Theory Questions

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