The set will get small for these #WildTalkers (https://twitter.com/thezooonlatv/status/783105706689912832)
In the example above, what does "get small for" mean? Does it mean that the set will less spacious since these people are coming? Is this just another way of expression that these people will come to the set? I couldn't find any definition regarding this expression, so I think it's not an idiom.