3"?
Amateur.
(Captain Placid 24/7 ball gags, brownie mix and clown porn, Sat 12 Apr 2014, 10:07, 2 replies)

maybe that's the distance of the oscillations

( the prick of misery pierced my foot on a spiiiike on, Sat 12 Apr 2014, 11:33, closed)

Wavelength
That would about 3 octaves above middle C.
(the other guy not the one that gave you coochie warts, Sat 12 Apr 2014, 13:55, closed)

I was thinking amplitude, but that works too
ps ooh, mathy!
( the prick of misery pierced my foot on a spiiiike on, Sun 13 Apr 2014, 6:32, closed)

god knows
I tried the 5 inch but was getting close to prolapse/hospital visit/amusing anecdote for ER staff. With an assistant so you can fully relax I could see it being possible. Not looking for volunteers thanks.
(unclestinky, Sun 13 Apr 2014, 8:53, closed)