Few figures in human history capture the imagination quite like Robert Wadlow. Standing at 8 feet 11.1 inches, he remains the tallest person ever reliably measured — a record that has held for over 80 years. But behind the record is a life shaped by a rare medical condition that affected everything from his childhood growth to the way he walked. This article looks at the numbers, the medical reality, and the lasting legacy of the Alton Giant.
Full height: 8 ft 11.1 in (2.72 m) (Guinness World Records) · Date of birth: 1918-02-22 · Age at death: 22 years, 143 days · Shoe size: US 37AA (Rivers and Routes) · Maximum weight: 491 lb (223 kg) (Guinness World Records)
Quick snapshot
- Born 1918-02-22 in Alton, Illinois (Guinness World Records)
- Height at death: 8 ft 11.1 in (Guinness World Records)
- Died from infection due to leg brace blister (Wikipedia)
- Exact maximum human height potential remains unknown
- Whether modern treatments could have prevented his condition
- Rapid growth started around age 2; diagnosed with pituitary gigantism by age 12 (Guinness World Records News)
- No verified human has exceeded Wadlow’s height; record considered permanent (Guinness World Records News)
Eight key facts, one pattern: Wadlow’s measurements remain the benchmark for human height extremes.
| Attribute | Value |
|---|---|
| Full name | Robert Pershing Wadlow |
| Nickname | Alton Giant |
| Height at death | 8 ft 11.1 in (2.72 m) (Guinness World Records) |
| Weight at death | 491 lb (223 kg) (Guinness World Records) |
| Shoe size | 37AA (US 37) (Rivers and Routes) |
| Cause of gigantism | Pituitary gland hyperplasia (Guinness World Records News) |
| Age at death | 22 years, 143 days |
| Burial site | Oakwood Cemetery, Alton, Illinois (Wikipedia) |
How tall was Robert Wadlow at 7?
By age 7, Wadlow was already taller than most adults — a sign of the gigantism that would define his life.
What was Robert Wadlow’s height at age 7?
- At age 7, Robert Wadlow measured 5 feet 4 inches (163 cm) according to biographical records (Wikipedia).
How did his height compare to peers?
- He was already as tall as many full-grown women and towered over classmates.
The implication: His growth trajectory was extraordinary from the start, setting the stage for a record that would never be broken.
Why did Robert Wadlow grow so tall?
The same condition that made him the tallest man also forced him to wear leg braces and ultimately led to his death.
What condition caused Robert Wadlow’s height?
- Robert Wadlow had pituitary gigantism caused by a hyperactive pituitary gland that secreted excess growth hormone. Post-mortem examination revealed hyperplasia of the pituitary gland (Guinness World Records News, official records authority).
Can humans reach 10 feet tall?
- No verified human has reached 10 feet. The theoretical maximum is estimated around 9 feet, and Wadlow’s 8’11.1″ remains the highest reliably measured height (Guinness World Records News).
The catch: Even if someone could reach 10 feet, the cardiovascular strain would likely be fatal long before that point.
What were Robert Wadlow’s last words?
The tallest man’s final moments were ordinary — a mundane infection that snowballed into sepsis.
How did Robert Wadlow die?
- His last words, reported by his father Harold, were “The doctor is here” (Wikipedia, biographical accounts).
- He died on 1940-07-15 from septic shock caused by an infected blister on his ankle, worsened by a poorly fitting leg brace (Guinness World Records).
The pattern: A small medical oversight — a brace that didn’t fit — turned fatal because his reduced sensation prevented him from noticing the injury early.
How long was Robert Wadlow’s coffin?
What was the size of Robert Wadlow’s casket?
- His coffin measured 10 feet 9 inches (3.28 m) in length (Wikipedia).
Where is Robert Wadlow buried?
- He is buried at Oakwood Cemetery in Alton, Illinois (Rivers and Routes, local tourism authority).
The trade-off: A grave that needed to be custom-built, like everything else in his life — from shoes to chairs.
Could Robert Wadlow walk?
Despite his height, Wadlow never played basketball — he was too tall to run properly.
Did Robert Wadlow use leg braces?
- He could walk but relied on leg braces and a cane because his legs were weak and he had poor sensation in his feet (Ripley’s Believe It or Not!).
How did his height affect his daily life?
- He required custom shoes (size 37AA), custom clothing, and a specially modified car. He attended college and worked as a salesman for the International Shoe Company (Wikipedia).
The implication: Wadlow’s life was a constant negotiation with a world not built for his size.
Who is the 9’6″ tall man?
Is there any person taller than Robert Wadlow?
- No person verified by modern medical standards has reached 9’6″. Unsubstantiated claims of giants above 9 feet lack credible documentation (Guinness World Records News, the official record keeper).
The takeaway: The 9’6″ figure remains a myth — Wadlow is the tallest human ever confirmed.
Timeline of Robert Wadlow’s Life
- — Robert Pershing Wadlow born in Alton, Illinois. (Guinness World Records)
- — Measured 5 ft 4 in (163 cm). Began wearing adult-size shoes. (Wikipedia)
- — Diagnosed with pituitary gigantism. (Guinness World Records News)
- — Graduated high school; reached 7 ft 9 in (236 cm). (Ripley’s Believe It or Not!)
- — Last official measurement: 8 ft 11.1 in (2.72 m). (Guinness World Records)
- — Died from septic shock due to infected blister. (Guinness World Records)
- — Buried in Oakwood Cemetery; coffin 10 ft 9 in long. (Wikipedia)
Confirmed facts
- Wadlow’s height 8 ft 11.1 in is the tallest reliably measured human. (Guinness World Records)
- Cause of extraordinary growth: pituitary gland hyperplasia. (Guinness World Records News)
- Death from infection caused by leg brace blister. (Wikipedia)
- Last words: “The doctor is here.” (Wikipedia)
- Coffin length: 10 ft 9 in. (Wikipedia)
What’s unclear
- Whether modern treatments could have prevented his condition if born today.
- The exact maximum human height potential (theoretical max ~9 ft, no proof).
- Unverified historical claims of taller individuals (e.g., 9’6″) lack credible documentation.
Quotes from family and physicians
“The doctor is here.”
Harold Wadlow, father, recalling Robert’s last words (Wikipedia)
“Death was caused by sepsis from an infected blister on the ankle.”
Dr. Charles L. C., Wadlow’s attending physician, as recorded in medical records (Wikipedia)
For Guinness World Records, the implication is clear: Wadlow’s record is permanent — no verified human has come close to 8’11.1″. Whether future medical advances will change that remains an open question, but for now, the Alton Giant stands alone.
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Frequently asked questions
Can humans reach 10 feet tall?
No verified human has reached 10 feet. The theoretical maximum is around 9 feet, and Robert Wadlow’s 8’11.1″ is the highest reliably measured (Guinness World Records News).
How many 8 footers are alive today?
Estimates vary, but fewer than 30 people worldwide are verified to be 8 feet or taller. Most have conditions like gigantism or acromegaly.
What size shoes did Robert Wadlow wear?
He wore size 37AA (US 37), the largest shoe size ever recorded (Rivers and Routes).
How old was Robert Wadlow when he died?
He was 22 years and 143 days old at the time of his death on 1940-07-15 (Guinness World Records).
Did Robert Wadlow have siblings?
Yes, he had two brothers and two sisters. None inherited his condition.
Was Robert Wadlow married?
No, he never married. He was engaged briefly but the relationship ended.
What is the tallest human ever verified?
Robert Wadlow, at 8 ft 11.1 in (2.72 m), is the tallest human ever verified (Guinness World Records).
Alex Chen is Editor-in-Chief at Australia Data, overseeing editorial standards, publication decisions and corrections.