I think in datatype.sgml line 506 or so:
authorBruce Momjian
Thu, 16 Nov 2000 06:03:40 +0000 (06:03 +0000)
committerBruce Momjian
Thu, 16 Nov 2000 06:03:40 +0000 (06:03 +0000)
commit5a0152b3fd5ee7e533e29d33d700850fbdd6a91f
tree2a40184b8e2d3263390cb185e9a1fa23487e5aad
parent312063c97be346c3ce01faff021e9bff0464fa5c
I think in datatype.sgml line 506 or so:
    varchar(n)
        (4+x) bytes

should be
   varchar(n)
        (4+n) bytes

or
   varchar(x)
        (4+x) bytes

Regards

Laser Henry
doc/src/sgml/datatype.sgml