The Proton e.MAS 5 should be practical enough for family use if its cabin layout suits your passengers. Useful size figures include 2026 325km Premium: 4135 mm; 2026 225km Prime: 4135 mm; 2025 325km Premium: 4135 mm; 2025 225km Prime: 4135 mm; 2026 325km Premium: 1805 mm; 15 more variants. Wheelbase and seating matter most day to day because they influence rear-seat comfort, child-seat friendliness and how relaxed the car feels on longer trips.