Hi........depending on the age of your table.......at one time there were no 'standards in the industry' like we know them today. Items were built at whatever the craftsman thought it to be...............on the other hand your table could have been cut down perhaps because of damage (wood rot, termites, etc.) to one or more legs.
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best............... .Tim
"Be nice to people on your way up because you might meet them on your way down."
- Jimmy Durante