If you've ever struggled to reach an octave, you probably blamed your hands.
New research out of Stanford University suggests it might be the keyboard's fault.
In July 2026, Stanford reported on a study led by concert pianist Elizabeth Schumann, the Billie Bennett Director of Keyboard Programs at Stanford, with support from the Wu Tsai Human Performance Alliance.
Her team had advanced pianists play the same tasks — octave scales, trills, tremolos and chords — on two versions of the same instrument: one with the standard 6.5-inch octave, and one with a narrower 6.0-inch octave.
They measured speed, accuracy and force. The biggest improvements showed up in pianists whose comfortable reach tops out at an octave. To the team's knowledge, it's the first measurable evidence that the standard keyboard puts a real performance ceiling on smaller hands.
Schumann described her first time on the narrower keyboard like wearing the right size shoes after a lifetime in the wrong ones.
A 2015 survey of 473 adult pianists found only about 13% of women have a hand span large enough to comfortably play repeated, fast octaves on a standard keyboard — compared with 76% of men.
Of 49 students who auditioned for advanced piano lessons at Stanford, about a third said they'd been discouraged from standard repertoire because of hand size, and almost half had been injured or feared injury from practice.
One of Schumann's students performed Rachmaninoff's Second Piano Concerto this year — a piece she said she wouldn't have attempted without a narrower keyboard.
The modern keyboard was standardized around 1880, when European virtuosos like Franz Liszt were international celebrities — and the famous performers of the day were mostly men with larger hands.
Before that, keyboard sizes varied. Chopin's own piano was smaller than today's standard.
String players have always had options. Violins, violas and cellos come in graduated sizes. Pianists have mostly had one.
Alternatively sized keyboards aren't new. The DS Standard — named after Canadian pianist Christopher Donison and Pennsylvania engineer David Steinbuhler — defines three sizes:
DS6.5 — the conventional keyboard (6.5-inch octave)
DS6.0 — the "Universal" size (6.0-inch octave), also known as 15/16
DS5.5 — the 7/8 size (5.54-inch octave)
The DS Standard Foundation, a nonprofit, now works to certify these keyboards and get them into studios and schools. Since 2013, a global network of pianists and teachers called PASK (Pianists for Alternatively Sized Keyboards) has been advocating for change.
Hailun is one of the piano makers offering DS-sized keyboards, including on its HU-1P upright. And the conversion is reversible — the original keyboard can go back in when needed.
Adults with smaller hands who've always found octaves and big chords uncomfortable
Students who feel tension or pain during practice
Players who've been steered away from Romantic repertoire because of their reach
The only way to know is to sit down and play one.
The Piano Place was the first store in the Midwest to represent D.S. Standard keyboards, available on the Hailun HU1P 48" upright. Want to feel the difference for yourself? Call (248) 619-9027 or contact us to set up an appointment, and learn more on our Size Adaptive Keys page.
Sources (fact-check only):
Stanford Report, July 8, 2026 — study, 13%/76%, 473 pianists, 49 students, Rachmaninoff, 1880 standardization, Chopin's piano: news.stanford.edu/stories/2026/07/piano-keyboard-design-standard-narrow-women-research
DS Standard Foundation — DS6.5/6.0/5.5 naming: dsstandardfoundation.org/the-standards/
PianoBuyer — exact octave widths (6.0" and 5.54"): pianobuyer.com/post/alternatively-sized-keyboards-a-university-experience
Wikipedia "Musical keyboard" — Donison/Steinbuhler, nonprofit since 2018, PASK since 2013, Hailun USA DS6.0/DS5.5
World Piano News — Hailun HU-1P with DS keyboard, reversible: worldpianonews.com/new-product/hailun-pianos-and-ds-keyboards/
The Piano Place Size Adaptive Keys page: thepianoplace.com/pages/smaller-sized-keys
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