Boys, meanwhile, have piled on a whopping 7cm (2.75 inches) over the decades, and have chests 8cm (3inches) larger than 11-year-olds did three decades back.
Some 2,500 youngsters aged from four to 17 were measured using 3D body scanners for the study, which revealed that the average 11-year-old girl stands at 4ft 11in tall, compared to her 1978 counterpart who was 4ft 9.5in.
Boys of the same age are now 4ft 10in, an inch taller than children of the same age in 1978.
Richard Barnes of Select Research, who undertook the study, said that the increases in height and chest size show that children have grown 'in many ways'.
Do children seem much bigger these days?
Do you struggle to find clothes to fit your kids?
Do you children wear adult togs, rather than designated childrenswear?
More on Parentdish:
Suggested For You
SUBSCRIBE AND FOLLOW
Get top stories and blog posts emailed to me each day. Newsletters may offer personalized content or advertisements.Learn more