1-byte integers

how can i specify an integer to be one byte byte or even 4 bits long?
int1, int(1), tinyint are nowhere to be seen.
smallest i can find is smallint that is 2 bytes.

in a table i will have a few columns with values between 0 and 15, so 
optimally i am looking for some kind of  unsigned 4-bits, or (un)signed 
integer (1-byte).

i can live with smallint for a while but estimate a few millions of rows 
in the table to be a reality soon, in such cases every byte matters.

is there some

stig