You must know what will be in the room before determining the size required for a ping pong table. The general space needs have already been covered. The recommended amount of space is 3 feet on each size and 5 feet at each end for a table that is 9’ x 5’. It’s a 15 × 11-foot space. But you only need that space for play. What about additional things like furniture, lighting, a TV, cabinets, and chairs? Consider how you’ll use the space. Is this a game room or is it just for ping pong. Do you have any other games, such as shuffleboard or pool? Those games will also require room, so you’ll need to take that into consideration.
How about a refrigerator, a bar, or some shelving? And how many people are expected to be present? You don’t need a lot of space if there is only one player and you. But you’ll need more space if you play doubles or host gatherings.
Always keep in mind that measurements are taken from the edge of the table to any walls, columns, or other wall-protruding objects. If there are seats, shelves, cupboards, etc. in the space, you measure from the edge of the table to those items.
An 18’ by 15’ space, in my opinion, is the perfect size for a ping pong table. A few extra feet are provided on all sides for other games, chairs, tables, and movement while people are playing.