Yes, but unfortunately if you need the Small for standover height, you don't have the option of going larger to get the knee length.
order a Bike Friday Pocket rocket and that's possible.. Long .. top tube (there really is only one tube)
is their sizing ... offered in 8 different length choices .
the 451 20 " wheel is really quick acceleration .. or 406 wider, +< tire selection
[+its an easy pack job, bike in the trunk, rather than on an outside rack.
My BF, a Medium , a 56, I can mount it like a step thru frame.