"vague figure" is a correct and usable phrase in written English.
It is usually used to describe a person in a way that is not detailed or specific, or to refer to a number or estimate that is not precise. For example, you might say, "The police made a vague figure of around 200 people who attended the rally."
Even when LaMamo returns from the wars, he remains a vague figure and is quickly dropped, as if Habila doesn't remember why he was interested in him.
Many of his paintings show the world from a fish's point of view, with an angler visible above a trout as a wavy, vague figure peering down through the surface.
In her second novel, a sequel to the award-winning The Golden Mean, Annabel Lyon gives voice to Pythias, Aristotle's only daughter and a vague figure on history's margins.
It may be news to those who only knew late, Sunday Supplement-era Jimmy – a prickly, paternally vague figure, condemned to roam his weather-less uPVC garden room – but Hill, who is now 85, remains one of the most persistently influential figures in modern English football, with a back-story that reads like a picaresque sashay through pretty much every innovation of the past 50 years.
This aside, even if I did have a vague figure in my head, I'd always say it was way smaller and according to studies, I'm not the only one.
One family I can't put even vague Figures to.
These rather vague figures are aimed at people still unconvinced by the net.
In the grey, silent streets upon which I gaze move certain figures, vague figures in clothes of an unreal blue.
She would see vague figures in the road, slam on the brakes, and then realize that nobody was there.
In the dusk I can see just a few vague figures across the pond-size area — other women barely visible through the steam.
The other gangsters (even the psychotic "Baby Face" Nelson) remain rather vague figures, difficult to recognise when seen briefly and usually in the shadows.
