The phrase "a queue of five" is correct and usable in written English.
It can be used to describe a line or sequence of five items or people waiting for something, such as service or attention.
Example: "At the coffee shop, there was a queue of five waiting for their morning caffeine fix."
Alternatives: "a line of five" or "a lineup of five".
Monkey hears there is a queue of eight for the three vacant slots with a grand selection committee making the final decision next Wednesday.
By mid-morning on a Monday, the exhibit was crowded, and a queue of thirty or so people had formed at the entrance.
On the turquoise horizon a queue of eight tankers waits to be filled by the output of the world's second-largest iron-ore mining operation.
The idea hit the headlines again this week, and the publicity has created a queue of seven corpses waiting for the world's first promatorium to open next year in the Swedish town of Jonkoping.
Disrespectful care Observations made in antenatal clinic at the outreach post linked to hospital U showed the norm to be a queue of six women waiting to be seen all sharing the same room whilst taking it in turns to be weighed, palpated and have personal questions answered.
Within minutes of a tanker's arrival, a queue of a hundred, and the driver calling armed police, because he cannot part with all his minimal supplies here.
There's usually a queue of about ten people in the toilets whilst you're trying to make yourself look half decent, you usually end up rushing on stage with one shoe on or something.
It's a classic setting for things like film junkets, where a queue of journalists get five minutes to ask famous people the same two questions.
At the busiest crossings, cars face a queue of up to four hours.
Roehampton University of Surrey today joined a queue of at least seven higher education colleges seeking university status.
