Well you were straight to the point
Fine then, I'll elaborate (sigh).
Ignore the length.
Do you end a letter to your mom mid-sentence, because you're at the bottom of the page and you planned ahead to write a one page letter? No. You flip the paper over and continue. Your letter's as long as it needs to be, to say what you need to say to Dearest Darlingest Momma. Right?
It's the same with every component of a story. From sentences on up.
Each paragraph completes a thought or action.
Each scene gathers thoughts and actions (paragraphs) into a unit that effectively conveys a coherent idea.
Each chapter orders and combines coherent ideas (scenes) to move the story on its critical path and ends at a milestone or crux that is recognizable to the reader as meaningful forward progress.
Chapters combine to tell the overall story, in such a way that each chapter contributes salient progress toward the story's end.
Nowhere does length enter into any of it. A scene is long enough to do its job. Same with chapters. Same with the book itself. It sounds like a simple thing. But if a scene fails to convey some meaningful idea, the reader will know it. If a chapter fails to reach some milestone or crux that is meangful to the overall plot-- if it ends simply because it's deemed long enough-- the reader will know this, too. Effective scenes are complete stories within chapters. Effective chapters are complete stories within the book. And an effective book begins, develops, and
ends.