is signed type suppose to be 32-bit?

I am testing on C data size with following program

#include <stdio.h>

#define MAXOF(n) (typeof(n))(-1)

#define hexfmt "%#lx"

#define printtype(n) \
{\
    n _a; \
    printf("%25s \t(%d bytes)\t " hexfmt "\n",#n,sizeof(n), MAXOF(_a) );\
}

int main(int argc, char const *argv[])
{
    printtype(signed char);
    printtype(unsigned char);

    printtype(signed short);
    printtype(unsigned short);

    printtype(signed short int);
    printtype(unsigned short int);

    printtype(signed int);
    printtype(unsigned int);

    printtype(signed);
    printtype(unsigned);

    printtype(signed long);
    printtype(unsigned long);

    printtype(signed long int);
    printtype(unsigned long int);

    printtype(signed long long);
    printtype(unsigned long long);

    printtype(signed long long int);
    printtype(unsigned long long int);

    return 0;
}

here is the output

Tested with gcc version 5.4.0 20160609 (Ubuntu 5.4.0-6ubuntu1~16.04.11)

           signed char       (1 bytes)        0xffffffff
         unsigned char       (1 bytes)        0xff
          signed short       (2 bytes)        0xffffffff
        unsigned short       (2 bytes)        0xffff
      signed short int       (2 bytes)        0xffffffff
    unsigned short int       (2 bytes)        0xffff
            signed int       (4 bytes)        0xffffffff
          unsigned int       (4 bytes)        0xffffffff
                signed       (4 bytes)        0xffffffff
              unsigned       (4 bytes)        0xffffffff
           signed long       (8 bytes)        0xffffffffffffffff
         unsigned long       (8 bytes)        0xffffffffffffffff
       signed long int       (8 bytes)        0xffffffffffffffff
     unsigned long int       (8 bytes)        0xffffffffffffffff
      signed long long       (8 bytes)        0xffffffffffffffff
    unsigned long long       (8 bytes)        0xffffffffffffffff
  signed long long int       (8 bytes)        0xffffffffffffffff
unsigned long long int       (8 bytes)        0xffffffffffffffff

Although the sizeof(signed char) is 1 bytes the representation when using printf is 0xffffffff (which is 4 bytes). Is that mean signed type always be 32bits?