The phrase "impeccable shape" is correct and usable in written English.
It means that something is in perfect or flawless condition. It can be used in a variety of contexts, such as describing physical objects, people's appearances, or even abstract concepts. Example: "The vintage car was restored to its impeccable shape, with not a single scratch or flaw in sight."
"We're very happy that both the paintings are in absolutely impeccable shape".
The place is not in impeccable shape, but with time and money, it could be beautifully restored.
At age 75, the thriving actress is in impeccable shape.
"The bottom line: He gave me the chills," Melendez-Perez saidescribinging Al-Qahtani as well groomed, "combative" and in "impeccable shape". At one point, the Saudi said there was someone waiting for him upstairs in the airport, Melendez-Perez recalled.
Claire Jolivet gave an impeccable, thoughtfully shaped, dramatically taut account of the Bach.
The orchestral playing is superior though not impeccable, the conductorial shaping of scenes magisterial and the detail of the textures remarkable despite the sonic limitations.
The new smell, impeccable feel, and timeless shape of iconic designer purses can only be described by somebody who has held one in their own hands.
Or David Mancuso, whose impeccable taste and style shaped generations of DJs and clubbers alike (14 November, 72).
A Kiton wardrobe reeks of quality extraordinary fabrics cut by Neapolitan tailors and shaped into impeccable shirts, suits, ties, overcoats and the like, all bearing the company's distinctive black label.
His pacing was impeccable: the work's overall shape and the tempo relationships among the recitatives, arias, ensembles and choruses were carefully judged but never fussy.
The present-day romance involves two young researchers, an American graduate student named Roland Michell Aaron Eckhartt) and a British junior professor named Maud Bailey (Gwyneth Paltrow, her hair drawn back into an impeccable bun and her syllables shaped into an equally impeccable over-educated upper-middle-class English accent).
