When it comes to first families, the Trumps stand head and shoulders above nearly all the rest.

At 6-foot-3, President-elect Donald Trump ranks as one of the three tallest presidents in U.S. history — but his wife and two of his children are second to none in the height department, according to research by The Washington Times.

Mr. Trump will make history Monday when he becomes only the second person in U.S. history to be sworn in for a second non-consecutive term at the 60th Presidential Inauguration Ceremony.

Beside him will be his wife, Melania Trump, who enjoys her own claim to White House fame: At 5-foot-11, the once and future first lady is locked in a three-way tie for tallest presidential spouse with Eleanor Roosevelt and Michelle Obama.

History buffs may ask: Wait, wasn’t Eleanor Roosevelt a 6-footer? The wife of President Franklin Roosevelt is sometimes listed at a cool 6 feet, but the FDR Presidential Library & Museum says her passport and other primary source documents put her at 5-foot-11.

For years, the Roosevelts maintained the height standard, boasting a passel of 6-foot-plus sons and one statuesque daughter: Anna Roosevelt Halsted, who long enjoyed the title of the tallest presidential daughter, at 5-foot-10.

Her closest competitor was Lynda Johnson Robb, now 80, the elder daughter of President Lyndon Baines Johnson. The LBJ Presidential Library places Mrs. Robb’s height at between 5-foot-9½ and 5-foot-10.

Then the sky-scraping Obamas and Trumps came ducking through the White House doorway.

Malia Obama was just 10 when her father Barack Obama won the presidency in 2008. After he left office, she was listed by various sources at 5-foot-11, putting her eye-to-eye with her willowy mother and besting Anna Roosevelt Halsted’s mark by an inch.

The elder Obama daughter didn’t hold sole possession of the height crown for long. No sooner had the Obamas left the White House than the Trumps arrived, including Mr. Trump’s older daughter Ivanka Trump.

Ivanka stands 5-foot-11, which places her in a two-way tie with Malia Obama for the title of tallest first daughter.

Ivanka’s brother Eric, at 6-foot-5, briefly held the top spot for presidential sons, breaking a tie between three of the Roosevelt brothers—James, Franklin Jr. and John — and Marvin Bush, youngest son of President George H.W. Bush. All four are listed at 6-foot-4.

Then Eric’s younger brother, Barron, hit his growth spurt. The youngest Trump isn’t just tall — he’s NBA tall. The 18-year-old New York University student has been described as 6-foot-9, and it’s not hard to believe, given how he towers over his parents in photos from the campaign trail.

Donald Trump has made occasional references to Barron’s height while expressing pride in his teenage son.

“He’s a great guy. He’s a little on the tall side, I will tell you. He’s a tall one, but he’s a good-looking guy, and he’s really been a great student,” Mr. Trump said in May on “Kayal and Company,” a talk show on 1210 WHPT-AM radio in Philadelphia.

Lincoln’s No. 1, but who’s No. 2?

To recap, the Trumps are tied with the Obamas for tallest first lady and tallest first daughter, and hold the record outright for tallest first son.

And yet there’s one height record that neither the Trumps nor the Obamas can touch: tallest president.

That distinction has long belonged to Abraham Lincoln, the 16th president, whose 6-foot-4 frame has yet to be equaled by any of his successors.

When it comes to who’s No. 2, however, Mr. Trump has an argument.

The Wikipedia “Heights of presidents” page lists LBJ as the second-tallest president at 6-foot-3½, citing Johnson biographers Robert Dallek and Robert Caro.

Other sources say differently. Johnson’s 1941 physical exam for military service records his height at 74½ inches, or 6-foot-2½. A year later, Johnson was listed at 74 inches, or 6-foot-2, on his release exam, as shown on documents posted by Celebrity Heights.

Johnson was 33 years old when he volunteered for active duty in World War II, meaning that he had long since finished growing.

In addition, the LBJ Presidential Library lists the 36th president’s height at 6-foot-3, which would make him the same height as Mr. Trump.

Or would it? Mr. Trump has said on several occasions that he’s 6-foot-3, but his Selective Service registration card filled out in 1964 puts his height at 6-foot-2. Then again, he had just turned 18, meaning that he may have still been growing.

There was a flurry of media interest in Mr. Trump’s vital statistics in 2023 after he was booked in Fulton County, Georgia, on election-tampering charges. He reported his height at 6-foot-3 and his weight at 215 pounds, although most of the skepticism centered on his weight.

Records from his 2023 arrest in New York City on charges of falsifying business records put him at 6-foot-2.

Mr. Trump is also 78, meaning that his stature may have taken a hit due to the ravages of time and the consequences of gravity. Men typically lose an inch in height between the ages of 30 and 70, according to the University of Arkansas for Medical Sciences.

Either way, Mr. Trump and most of his family still qualify for membership in the Tall Clubs International. The cut-off is 6-foot-2 for men and 5-foot-10 for women.

• Valerie Richardson can be reached at vrichardson@washingtontimes.com.