The struct module is often used (at least by me) to implement protocols  and binary formats. That makes the exact sizes (number of bits/bytes) of the different types very important.

Please add the sizes to for example the table on http://docs.python.org/library/struct . I know that some of the sizes varies with the platform, and in these cases it is fine to define it in terms of the C types, but for Python programmers writing cross-platform code such variable types doesn't matter and are "never" used. (I assume that it is possible to specify all possible types in a cross-platform way, but I'm not sure and the answer is not obvious from the documentation.)