The MINI Cooper Convertible should be manageable in city use when judged against its listed dimensions. Key size figures include 2026 2.0T S: 3879 mm; 2026 2.0T S: 1744 mm; 2026 2.0T S: 1431 mm; 2026 2.0T S: 2495 mm; 2026 2.0T S: 4. Length affects parking ease, width affects tight ramps and urban lanes, while wheelbase gives a clue to cabin comfort and highway stability.