The new Xbox controller leak shows quite the difference in body design. Since we don't know the overall size, I compared it's size in 3 different ways to the current controller :
Native vs Upscaled 4K on XSX | XSS : r/XboxSeriesX
Series X just arrived today. Is this enough space for adequate airflow? : r/ XboxSeriesX
My opinion of the Xbox Series X as a first timer..... : r/xbox
Xbox Series X Setup : r/XboxSeriesX
Xbox Series X Wireless controller review - Polygon
I've been using the new Xbox Series X for 6 years AMA : r/pcmasterrace
Is this enough room for my Xbox Series X? Been here for about a year but noticed the fans were quite dusty. : r/xbox
Elite series 2 vs regular series controllers : r/XboxSeriesX