89% matchQuiksilver
Quiksilver shares a similar surf/skate aesthetic and product range with O'Neill.
O'Neill
StyleAthleisure / SportswearGorpcore / OutdoorStreetwear
Known forShortsSwimwear
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.
You might also like
89% match
88% matchSig Zane Designs
Very similar style, silhouette, and fit, with a matching focus on cultural and aesthetic richness through unique prints.
86% matchPacSun
Matches O'Neill in style, silhouette, palette, and segment. Widely recognized in similar niche with trendy offerings.
See all 30 brands like O'Neill →
How O'Neill fits
| Category | Runs | Shape | Length | Size advice | Confidence |
|---|---|---|---|---|---|
| Hoodies & sweatshirts | true to size | regular to relaxed, easy through the shoulders | regular hem, sleeves occasionally noted as long | Stick with your usual size; no need to size up unless you layer heavily. | medium |
| Shirts & overshirts | true to size | relaxed camp-collar and casual woven cuts rather than slim dress shirting | regular, designed to be worn untucked | Buy your normal size and size down if you want the shirt to sit closer to the body. | low |
| Trousers & pants | true to size | regular to relaxed through seat and thigh, hybrid walkshort and chino styling | regular inseam; shorts often sit at or above the knee | Order your measured waist size, keeping in mind stretch hybrid fabrics can feel a touch snug at first. | low |
| Jackets | slightly large | roomy technical snow and windbreaker fits built over layers | regular to slightly long for coverage | Take your usual size for layering room, or size down if wearing the jacket as a standalone piece. | medium |
| T-shirts & graphic tees | slightly large | relaxed, straight through the body with a fairly generous chest | regular to slightly long in the body | Take your normal size for a classic loose surf tee, or size down if you prefer a fitted look. | medium |
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.
Directional fit consensus summarized from public sources with AI — a starting point, not a guarantee. Confirm with the product's own measurements before buying.
Not sure what size to buy?
Paste a O'Neill listing's measurements and compare them to something you already own.
Check fit with O'NeillBought O'Neill? Share how it fit