[jojobas]

Just a note: Myra Hess had "tiny" hands and played full size pianos beautifully.

As the video says, it's always more about the ability to stretch than size.

When you go for narrower keys for inability to stretch you lose fluency as your fingers are as thick as the other guy's.

[interglossa]

Josef Hofmann and Daniel Barenboim played pianos with smaller keys.