What Is Sizing Like at Stone Island Marina? (Menswear)
By Ella Blake — Sizing Expert Stylist & Founder of TellarDate: 2026
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Stone Island Marina runs slim and small for the size. Like the main line, it's cut on an Italian last, so nine times out of ten you'll want to go one size up from your usual UK fit — particularly in the knitwear and the deck jackets. If you're a true medium on the high street, an M in Marina will feel snug across the chest and short in the body.
The fit, piece by piece
Marina is Stone Island's nautical-leaning capsule — garment-dyed cottons, chunky marine knits, deck jackets, the occasional bold stripe. Gorgeous stuff, but the cut isn't uniform across the range, so it pays to know what you're buying.
Knitwear — The heavy roll-necks and marine crews are the trickiest. They read boxy through the body but are cut narrow across the shoulders, so a lot of men buy the shoulder and end up with a jumper that's tight up top and short in the hem. If you layer, size up.
Overshirts & deck jackets — Slim through the chest with a slightly long sleeve. Fine if you wear them over a tee; a size up if you want a mid-layer underneath.
Garment-dyed cottons — The dyeing process shrinks and firms the fabric, so these come up the truest to size in the whole line. Buy your normal fit here.
Trousers & cargos — Cut for a tapered leg, not a relaxed one. If you're between waist sizes, take the larger — the garment dye tightens after the first wash.
One thing worth flagging: Stone Island labels in EU sizing, and the S/M/L mapping isn't always consistent between a knit and a jacket in the same collection. Don't assume your badge size carries across. I've been caught out by exactly this — bought a Marina crew and a deck jacket in the same "L" on the same day, and the crew fit like an M while the jacket swamped me. Measure, don't guess.
How I'd style it
Marina works best when you let the piece do the talking and keep everything else quiet. A garment-dyed overshirt over a plain heavyweight tee, tapered trousers, and a clean trainer or a suede boot — done. Resist the urge to pile on more logos. The chunky knits look sharpest over a simple crew-neck tee with straight, dark denim, so the texture reads without the whole outfit shouting.
Where else to look — by budget

If you love the technical-nautical world Marina lives in but want options at different price points, here's where I send clients.
High street
COS — The best on the high street for the clean, elevated layers that sit beautifully under a Marina piece. Their heavy tees and merino crews are the quiet backbone of the look.
Arket — Scandinavian, understated, and genuinely good knitwear for the money. Their lambswool jumpers give you the marine-knit texture without the four-figure ticket.
Independent & boutique
Nigel Cabourn — If it's the naval, military-archive spirit you're chasing, Cabourn is the real thing. Properly researched heritage outerwear and deck knits from a British designer who lives and breathes it.
Universal Works — Nottingham-based, workwear-rooted, brilliant fabric. Their overshirts scratch the same itch as a Marina one for a fraction of the outlay, and the cut is more forgiving.
Designer & luxury
C.P. Company — Stone Island's closest sibling in feel. Technical Italian outerwear with the same obsessive fabric development, and it tends to fit a touch more relaxed if Marina's cut feels sharp on you.
Ten C — Founded by two ex-Stone Island designers, so the DNA is unmistakable. The OJJ jacket is a modern classic and the fits run more generous — a good shout if you're broad.
Moncler — For the top-end quilted outerwear that pairs cleanly with a Marina knit underneath. Note Moncler numbers its sizes (0–5) and runs slim, so size up there too.
Stop guessing your Stone Island size
Stone Island's Italian sizing is exactly the kind of thing that catches men out and drives returns. Tellar is the UK's leading free sizing tool — match your body to 1,500+ brands instantly and never squint at a size guide again.
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