Quick Answer: Tall ranges add length to sleeves and hems but usually keep the proportion between them fixed to the regular block. On a tall frame, extra height is distributed unevenly - most tall women carry more of it in the leg than the torso - so a coat lengthened uniformly ends at a point that relates to nothing. The hem needs to land at a body landmark: mid-thigh, just above the knee, or mid-calf. Anywhere between those reads as wrong even when every measurement is technically correct.

The coat fits. Every individual measurement checks out.

And it still reads as slightly borrowed, because the hem is landing in the gap between two landmarks.

What is actually wrong with the length?

Coat hems need to land on a landmark, not a measurement. Mid-thigh, just above the knee, mid-calf and just above the ankle all read as deliberate; the points between them do not.

Tall grading lengthens everything proportionally to the regular block, which moves the hem without regard to where your knee actually is.

Most tall height is in the leg rather than the torso, so a proportional lengthening overshoots the torso and undershoots the leg.

The most common failure is a hem landing mid-knee, which is the one length that flatters nobody and is exactly where uniform grading tends to put it.

Just below the knee is the second failure point, cutting the leg at its widest visible point.

Which is why a coat can be the right size and the wrong length simultaneously, and why the fix is a hem rather than a size change.

Where should a coat actually end on a tall frame?

Mid-thigh for a short coat, which on a tall frame is genuinely mid-thigh rather than the hip point a regular coat lands on.

Just above the knee for a mid-length, never on the kneecap and never just below it.

Mid-calf for a long coat, at the narrowest point of the calf rather than at its widest.

Just above the ankle bone for a full-length, which needs to clear the ground with the shoes you actually wear.

And the rule underneath all of them: end at a narrow point, not a wide one. Knees and calf-widest are wide points; mid-thigh and mid-calf are narrow ones.

Which makes coat hemming one of the most worthwhile alterations for tall women and one of the least commonly done.

Why do long coats work so well on tall frames?

They use the height rather than fighting it. A long line uninterrupted from shoulder to calf reads as deliberate scale.

Fewer horizontal breaks means a longer visual line, and tall frames have the length to carry a single unbroken vertical without looking swamped.

They also solve the hem problem by default, since mid-calf and above-ankle are both landmarks that are easy to hit.

Volume is easier to carry at height, so an oversized long coat reads as architecture on a tall frame where it reads as borrowed on a short one.

And it is one of very few categories where tall is an outright advantage, which is worth using.

The caveat is sleeve length, which a long coat does not fix and which still needs checking over a knit.

5 Tall Outerwear Mistakes

1. Buying regular sizing up for length. Sizing up adds length everywhere, including width, so you end up with a coat that is long enough and two sizes too wide through the shoulder. The shoulder is the one measurement that cannot be altered cheaply, so this trade is always a bad one.

2. Assuming tall ranges solve proportion. They solve length. The relationship between shoulder, waist, hem and sleeve stays graded from the regular block, which is why a tall coat can have every measurement right and still sit oddly.

3. Never hemming a coat. Coat hemming on an unlined or simply-lined coat is a normal alterations job. Tall women hem trousers routinely and almost never think to hem outerwear, and outerwear is where the landmark problem is most visible.

4. Trying coats on over a summer top. A coat needs to close over a knit. Trying it on in August over a tee reliably produces a coat that pulls across the back in November, and the shoulder and armhole is where it fails first.

5. Ignoring where the pockets land. On a lengthened coat, pockets are graded down with the rest of the garment and frequently end up too high for a long arm. Reaching upward into your own coat pocket all winter is a small daily irritation that is worth checking in the shop.

And the one that costs the most: buying the coat that fits rather than the coat that is long. Tall frames are best served by long coats, and the instinct to buy a short one because it is easier to find in the size is how most tall wardrobes end up short on outerwear.

FAQ: Tall Coat Questions, Answered

Can wool coats be hemmed?

Yes, and it is routine work. Lined coats cost more because the lining has to be shortened and reattached, but it is a standard alteration.

What length should I default to?

Mid-calf if you can find it. It uses your height, clears the knee problem entirely, and is the easiest landmark to hit.

How do I check coat fit in August?

Take a knit with you and put it on. Judge the shoulder, the armhole and the closure over the knit, not over what you walked in wearing.

Is sizing up ever right for outerwear?

Only if the shoulder still fits, which it usually will not. Shoulder first, then everything else can be altered.

Why do my coat sleeves look short even in tall sizing?

Coat sleeves should cover the wrist bone entirely, since they go over other sleeves. Tall grading often produces a jacket-length sleeve on a coat.

Are oversized coats good or bad for tall frames?

Good, provided the length is long. Oversized and short reads as borrowed; oversized and long reads as intentional.

TL;DR:

• Coat hems must land on a landmark - mid-thigh, above the knee, mid-calf - not on a measurement.
• Tall grading lengthens proportionally to the regular block, which often puts the hem mid-knee, the worst possible point.
• End at a narrow point of the leg, never a wide one.
• Long coats suit tall frames outright and solve the hem problem by default.
• Try outerwear over the knit you will actually wear, and check where the pockets land.

Every measurement can be right and the coat can still be wrong. Length is a landmark, not a number.