Sentence examples for such a scale from inspiring English sources

'such a scale' is correct and commonly used in written English.
It is typically used to introduce a specific measure or extent of something. For example: - The devastation caused by the earthquake was on such a scale that it would take years to fully recover. - The success of their business was beyond anything they had imagined, reaching such a scale that they were able to open multiple locations. - The project's funding was cut significantly, impacting research efforts on such a scale that progress was hindered. - The beauty of the landscape was on such a grand scale that it took our breath away.