90% matchBillabong
Same wetsuit-plus-boardshort surf heritage, Australian roots
What changes: No wetsuit-tech pioneer story; broader beach-print casualwear
Brand profile
O'Neill
California surf label founded in 1952 that pioneered the neoprene wetsuit, now making wetsuits, boardshorts, swimwear and snow outerwear.
San FranciscoOrigin
UnisexFocus
Athleisure / SportswearStyle
$$Price
What to know about O'Neill
The wetsuit came from here
Jack O'Neill's shop pioneered the neoprene wetsuit, plus the surf leash, split-toe bootie and rash guard — the brand's history is surf equipment, not just apparel.
Boardshorts and swim carry the line
The range spans wetsuits, snow outerwear and casual apparel, but shorts and swimwear are what O'Neill is actually bought for at mid-market prices.
Licensed, not founder-run
Sisco Textiles in Luxembourg has owned the brand since 2007 and La Jolla Group has held the US apparel license since 1993; the Santa Cruz flagship closed in early 2025.
How O'Neill fits
Overall fit
true to size
Most shoppers report O'Neill casualwear fits close to standard US sizing but with a relaxed, roomy surf-brand cut, while boardshorts and wetsuits are the pieces people most often find need a size adjustment.
Tip: Order your usual size for a relaxed casual fit, and size down only if you want a trimmer, more modern silhouette.
Medium confidence · based on 14 sources
By category
| Category | Runs | Shape | Size advice |
|---|---|---|---|
| Hoodies & sweatshirts | true to size | regular to relaxed, easy through the shoulders | Stick with your usual size; no need to size up unless you layer heavily. |
| Shirts & overshirts | true to size | relaxed camp-collar and casual woven cuts rather than slim dress shirting | Buy your normal size and size down if you want the shirt to sit closer to the body. |
| Trousers & pants | true to size | regular to relaxed through seat and thigh, hybrid walkshort and chino styling | Order your measured waist size, keeping in mind stretch hybrid fabrics can feel a touch snug at first. |
| Jackets | slightly large | roomy technical snow and windbreaker fits built over layers | Take your usual size for layering room, or size down if wearing the jacket as a standalone piece. |
| T-shirts & graphic tees | slightly large | relaxed, straight through the body with a fairly generous chest | Take your normal size for a classic loose surf tee, or size down if you prefer a fitted look. |
Directional fit consensus summarized from public sources with AI — a starting point, not a guarantee. Confirm with the product's own measurements before buying.
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O'Neill fit questions
Does O'Neill run big or small?
O'Neill fits true to size. Order your usual size for a relaxed casual fit, and size down only if you want a trimmer, more modern silhouette. Most shoppers report O'Neill casualwear fits close to standard US sizing but with a relaxed, roomy surf-brand cut, while boardshorts and wetsuits are the pieces people most often find need a size adjustment.
How does O'Neill fit?
Most shoppers report O'Neill casualwear fits close to standard US sizing but with a relaxed, roomy surf-brand cut, while boardshorts and wetsuits are the pieces people most often find need a size adjustment. Overall shape: generally relaxed, casual surf-brand cut with room through the chest and body.
How do O'Neill hoodies & sweatshirts fit?
O'Neill hoodies & sweatshirts fits true to size. Stick with your usual size; no need to size up unless you layer heavily. Shape: regular to relaxed, easy through the shoulders.
How do O'Neill shirts & overshirts fit?
O'Neill shirts & overshirts fits true to size. Buy your normal size and size down if you want the shirt to sit closer to the body. Shape: relaxed camp-collar and casual woven cuts rather than slim dress shirting.
How do O'Neill trousers & pants fit?
O'Neill trousers & pants fits true to size. Order your measured waist size, keeping in mind stretch hybrid fabrics can feel a touch snug at first. Shape: regular to relaxed through seat and thigh, hybrid walkshort and chino styling.
Brand facts
O'Neill is a surf brand founded by Jack O'Neill in 1952, starting with a San Francisco garage shop before relocating to Santa Cruz. It pioneered the neoprene wetsuit, the surf leash, the split-toe bootie and the rash guard. The range covers wetsuits, boardshorts, swimwear, snow outerwear and casual apparel, sold in dozens of markets. Brand ownership has sat with Luxembourg-based Sisco Textiles since 2007; La Jolla Group has held the US apparel license since 1993. In early 2025 the company closed its downtown Santa Cruz flagship while keeping other local stores.
- Founded
- 1952
- Origin
- San Francisco, United States
- Made in
- Asia
- Price
- $$
- Focus
- Unisex
- Facts checked
- September 2026
- Styles
- Athleisure / Sportswear, Gorpcore / Outdoor, Streetwear