Whilst a folding card table might be developed in any shape (square, circular, oval, hexagonal or octagonal) traditionally they're square shaped. This shape is very convenient for games where there is a fixed at quantity of players. For instance, there are always four players for that games of auction bridge or whist. Similarly, there are always two players in a game of bezique or piquet. Having a square table permits the different pairs (or players when it comes to two-handed games) to sit down facing each other in such a way that there's no chance of another player's cards being seen.
An average square folding card table could be around three sq ft as this size allows a good playing area whilst at the same time maintaining your folded table small enough to be easily stored keep. It will be designed so that only a the least floor space is going to be adopted when the table is not being used.
A round or oval shaped table are the best for all those games which are played without a fixed number of players; rummy and canasta have been in this category. Round tables are far more common than their oval counterparts if only because it is a simpler matter to design and create a round folding card table than an oval one.
Other shapes (hexagonal, octagonal, etc.) are seen only occasionally.
Regardless of the shape, the covering of the playing area of the table will have to be non reflective (so they won't reveal cards throughout the dealing process), need to be non slip (to keep cards from skidding around whilst being dealt) and want to permit the easy obtaining of dealt cards. In practice, these properties are provided by fixing a baize covering to the top of the table. This covering will normally be colored green, although blue baize is often used. The greater sophisticated tables will not have their tops completely covered in baize. An area of wood will be left uncovered for every player to use for drinks, with no problem of staining the baize, which, being fixed to the surface of the table, would be difficult to clean.