Trying to understand VACUUM VERBOSE

Quickie questions:

When VACUUM VERBOSE says a table has x pages, what is the size of
the indicated page?

I'm trying to correlate table size with the output of an EXPLAIN
of the SELECT INTO which created it.

I've got 33150 rows which the EXPLAIN said at top level would be
80-byte rows. VACUUM indicates 488 pages. Does this compute?

33150 x 80 = 2,652,000
2652000/488 = 5434

Is it reasonable to assume some overhead and that the pages are
8k? Is this why there's an 8k row-size limit?

++ kevin

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