Concrete panel length~5 ft between joints
Residential sidewalk width~4 ft
Commercial walkway width~5–6 ft
Drive-thru lane width~10–14 ft
Parking spot (standard)9 ft × 18 ft
1-car driveway width~9–12 ft
2-car driveway width~18–20 ft
3-car driveway width~26–28 ft
Standard driveway depth~18–22 ft (4 panels)
💡 From a photo: count panels along the length and multiply by 5 ft to estimate. A 2-car driveway with 4 panels deep ≈ 18 × 20 = 360 sq ft.