Rollercoaster Buckle Hardware
The brand's industrial rollercoaster-style buckle is its defining signature, applied here to bracelet and strap accessories.
Explore buckle pieces →Brand profile
Matthew M. Williams' label pairing industrial buckle hardware and harnesses with technical outerwear and minimal tailoring, now Paris-based.
35 brands like 1017 ALYX 9SM like A-COLD-WALL, Ambush, Off-White →



1017 ALYX 9SM is the label of American designer Matthew M. Williams, launched in 2015 with womenswear and adding menswear in 2017. Its output centers on industrial hardware — the rollercoaster buckle belt, harnesses and chain jewelry — alongside technical outerwear, cargo trousers, denim and pared-back tailoring in ripstop, leather and cotton shirting. Hong Kong entrepreneur Adrian Cheng took a majority stake in November 2023, confirmed as a partnership in January 2024, after which the headquarters moved from Ferrara, Italy to Paris. Collaborators include Nike and Audemars Piguet.
The brand's industrial rollercoaster-style buckle is its defining signature, applied here to bracelet and strap accessories.
Explore buckle pieces →Oversized chain links are the other half of the ALYX hardware language, running from jewelry through to accessories.
Explore chunky chain →Utilitarian leather strapping echoes the label's harness codes across its smaller goods.
Explore leather strap →Available atSSENSE
Overall fit
slightly large
Reported experience suggests ALYX generally fits true to size but reads slightly large on the body because of the label's roomy, long-cut Italian-made silhouettes.
Tip: Most shoppers find taking their usual size works for the intended oversized look, and sizing down one is the common move if you want it closer to the body.
Medium confidence · based on 9 sources
By category
| Category | Runs | Shape | Size advice |
|---|---|---|---|
| Hoodies & sweatshirts | runs large | oversized and boxy with heavy dropped shoulders | Sizing down one is commonly suggested unless you specifically want the very oversized look. |
| Jackets | slightly large | roomy through the chest and shoulders, cut with layering in mind | Your usual size generally works; consider sizing down if you plan to wear it over just a tee. |
| Jeans & denim | true to size | relaxed straight, with wider baggy cuts in some seasons | Take your normal waist size, but check the specific cut since silhouettes swing from straight to very wide. |
| Shirts & overshirts | slightly large | relaxed, straight-cut body rather than tapered | Stick with your usual size for a relaxed drape; size down if you want it tucked cleanly. |
| T-shirts & graphic tees | slightly large | boxy with dropped or wide shoulders | Take your usual size for the intended relaxed drape, or size down one if you prefer a closer fit. |
| Trousers & pants | true to size | straight to relaxed through the thigh, often with technical or cargo detailing | Order your usual waist and budget for a hem if you are under about 6ft. |
Directional fit consensus summarized from public sources with AI — a starting point, not a guarantee. Confirm with the product's own measurements before buying.
88% matchBrutalist industrial hardware, same 2015 design lineage
What changes: Rawer, more sculptural and art-led than Alyx's polished luxury
82% matchChunky silver hardware jewelry with unisex streetwear
What changes: More jewelry-led and playful, less technical outerwear
78% matchSame luxury-streetwear generation, graphic-led rather than hardware
What changes: Logo and print driven; less utility hardware and tailoring
76% matchDarker dystopian take on strapped, panelled techwear
What changes: Deeper sci-fi costume feel, far less minimal tailoring
1017 ALYX 9SM fits slightly large. Most shoppers find taking their usual size works for the intended oversized look, and sizing down one is the common move if you want it closer to the body. Reported experience suggests ALYX generally fits true to size but reads slightly large on the body because of the label's roomy, long-cut Italian-made silhouettes.
Reported experience suggests ALYX generally fits true to size but reads slightly large on the body because of the label's roomy, long-cut Italian-made silhouettes. Overall shape: generally relaxed to boxy with a streetwear-leaning silhouette, though some tailored and technical pieces sit closer to the body.
1017 ALYX 9SM hoodies & sweatshirts runs large. Sizing down one is commonly suggested unless you specifically want the very oversized look. Shape: oversized and boxy with heavy dropped shoulders.
1017 ALYX 9SM jackets fits slightly large. Your usual size generally works; consider sizing down if you plan to wear it over just a tee. Shape: roomy through the chest and shoulders, cut with layering in mind.
1017 ALYX 9SM jeans & denim fits true to size. Take your normal waist size, but check the specific cut since silhouettes swing from straight to very wide. Shape: relaxed straight, with wider baggy cuts in some seasons.