The short answer: a classic men's overcoat should end at or just below the knee. A longline coat falls a few inches below the knee towards mid-calf, and a shorter topcoat ends around mid-thigh. Which is right for you depends mainly on your height, and secondarily on what you wear underneath. Get the length right and a coat sharpens everything below it; get it wrong — too long on a shorter frame, too short on a tall one — and even a good coat looks borrowed.
The three lengths, defined by landmarks
Garment measurements in centimetres only help if you can picture them on a body, so think in landmarks instead.
- Mid-thigh (topcoat length). Ends halfway down the thigh. The lightest, most mobile option — easy in cars and on bikes — but the least formal and the least warm.
- Knee length (the classic). Ends at, just above, or just below the knee. This is the traditional overcoat proportion and the most versatile: formal enough for a suit, practical enough for daily commuting.
- Longline (below the knee). Falls between the bottom of the knee and mid-calf. The most covering and the most deliberate-looking; it needs the height — or the confidence in proportion — to carry it.
Anything approaching the ankle is a greatcoat line that very few men, and very few British pavements in February, reward. Wherever the hem falls, avoid one landmark in particular: the widest part of the calf, where a hem cuts the leg at its thickest point.
Length by height
Under about 5'8". Aim for just above the knee to mid-thigh. A coat that ends at or above the knee keeps the leg line visible, which preserves your proportions. A longline coat is not forbidden, but it should stop only just below the knee — once a coat swallows the calf on a shorter frame, the frame disappears with it.
About 5'8" to 6'0". You have the full range. Knee length is the safe classic; a longline coat ending a few inches below the knee will look intentional rather than oversized, provided the shoulders and chest fit properly. Fit, at this height, matters more than the extra inches either way.
Over about 6'0". Knee length can read short, particularly over a suit. A longline cut usually restores the intended proportion — the coat looks designed for you rather than borrowed from a shorter man. Avoid mid-thigh lengths unless you specifically want a car coat.
What you wear underneath changes the answer
An overcoat is the outer layer of a system, and length is relative to what sits below it. Over a suit, the coat should comfortably cover the suit jacket — a jacket hem peeking below a coat looks unfinished. Over knitwear and trousers, the rules relax: the coat simply needs to look proportionate to the outfit's overall line. Consider your trousers, too. A long coat over a clean, straight trouser reads elegant; over a wide, pooling trouser it can read heavy. When in doubt, the coat should end at a point where your legs still show enough to keep you looking like you are wearing the coat, rather than the other way round.
The practical tests nobody mentions
Length is also a logistics decision. On trains and in cars, a below-knee coat needs unbuttoning and a moment's arrangement when you sit, or the skirt creases and rides up. On escalators and wet platforms, mid-calf hems collect the weather. Cycling in anything past the knee is a poor idea. None of this rules out a long coat — most men adapt in a day — but a coat bought for a commute should be tested against the commute, not just the mirror.
Vents matter here too. A tailored overcoat is usually cut with a single rear vent, which lets the coat move when you walk and sit without the hem kicking. When you try a long coat, walk in it: the hem should swing and settle, not wrap around your shins.
Length is about build, not only height
Height is the starting point, but build refines it. A broad-shouldered man carries length well — the coat's vertical line balances his width — and can comfortably wear a longline cut at heights where a slighter frame would be swamped by it. A slim man, by contrast, should be more careful: the closer the fit through the chest and shoulder, the more length he can support, while a generous fit plus a long skirt multiplies fabric in a way that reads as a coat wearing him. Posture plays a quiet part too. A man who stands tall gets the full benefit of a long line; if you know you stoop over a desk all day, a slightly shorter coat is the more flattering and more practical buy.
There is also the question of what the coat does to your silhouette from behind, which is the view everyone else gets. A coat that ends cleanly at a landmark — mid-thigh, knee, just below the knee — looks deliberate from every angle. A coat that ends at an in-between point, halfway down the calf with no reference to the leg, tends to look like a sizing error even when it was a choice.
Fit through the body
Length gets the attention, but fit decides whether a coat looks tailored or merely large. The shoulder is the fixed point: the coat's shoulder seam should sit on your own shoulder, because everything else hangs from there, and shoulders cannot be altered economically. Through the chest, you should be able to fasten the coat over a knit without the front pulling or the lapels gaping. The waist of a tailored overcoat is usually gently shaped rather than straight — a completely straight body reads as a blanket, while a slight suppression gives the long line its elegance.
Sleeves should finish at the wrist bone, showing a small amount of shirt cuff at most. And check the coat sitting down and with your arms raised: a coat that only works while you are standing still will annoy you daily.
Checking length when you buy online
You cannot try a coat on through a screen, but you can get close. Take a coat or jacket you already own that ends where you like, lay it flat, and measure from the base of the collar down the back to the hem. Compare that figure with the garment length given for your size on the product page or size guide, and picture where the difference falls on your own leg using the landmarks above. If a product page does not state a garment length, that is a reasonable question to ask the retailer before buying — coats are too large a purchase for guesswork.
Our own longline option, the Hampstead overcoat at £197.95, is cut in the longline mould discussed here. For the broader picture — cloth, fit and styling — the men's longline overcoat guide covers the style in full. WARDLEY orders are dispatched within 1–2 working days, with free tracked UK delivery in 6–10 working days from order and 30-day returns, so a length decision made on measurements rather than hope is also protected if it proves wrong on your own frame.
Check it on our coats
Apply the landmark test to our own range. The Hampstead is the longline option — cut long, in the below-the-knee family described above. The Greenwich is a long double-breasted coat. The Pimlico is the shorter option, ending around mid-thigh like a topcoat. Each product page publishes its garment length for every size: measure a coat you already own from the base of the collar to the hem, compare the two figures, and you will know where each coat will land on you before it arrives. Browse all three in the men's overcoats collection.
Frequently asked questions
Should an overcoat cover your knees?
Traditionally, yes — the classic overcoat ends at or just below the knee. Just above the knee is a modern, slightly sharper proportion and suits shorter men well. The only real mistake is a length you chose by accident rather than by decision.
Can a short man wear a longline coat?
Yes, with discipline: keep the coat to just below the knee rather than mid-calf, make sure the shoulders and chest fit closely, and wear a clean, unbroken line underneath. Proportion management, not height, decides whether it works.
Is a longer overcoat warmer?
Marginally — it covers more of the leg and blocks more wind at platform level. But cloth weight and what you layer underneath make a far greater difference to warmth than two extra inches of hem.
What length of overcoat works over a suit?
One that fully covers the suit jacket, which in practice means knee length or longer for most men. The coat should also be the longest layer in the outfit — nothing should peek out beneath it except trousers and shoes.
How do I measure a coat's length?
Lay it flat, fasten it, and measure down the centre back from the base of the collar (where the collar meets the body of the coat, not the top of the collar) to the hem. Compare like with like when checking sizes online.