For a practice table, size actually matters little, and you are nailing down game concepts and procedures, - although they SHOULD be at least six feet across, and basically represent a "usuable gaming table." I built a six-foot practice crap table to practice dice on, and this was a minimum. You can build a six-foot plus game table with a layout and particle wood board from parts from Lowe's Home improvement: buy a full layout, and buy a wood particle board backing for the layout; apply the game layout with 3M spray-on permanent epoxy, using a dry paint roller; and use it as a "game-sized" table-top.
Casino sized games are generally:Crap tables:
14 to 18 feet long, or 8 feet for a tub. A two-sided 12-footer is often seen. For learning, a six-foot layout on a particle board base is fine as a table top practice table.Blackjack, Pai Gow poker/tiles, or Poker side game:
6 feet across.
Low-Boy Baccarat or PGP: 8 feet across.
Beware of all enterprises that require new clothes - Henry David Thoreau. Like Dealers' uniforms - Dan.