We supply our customers with different size units to fit all of their belongings! Boxes -to-Boats has been in business since 1993! 76 Unit Self-Storage facility located 2.6 miles South of Robbinsville, NC on US-129. We offer a wide variety of unit sizes at the lowest prices in the area. Unit Size Range: 5' X 10', 10' X 10', 10' X 15', 10' X 20', & 10' X 25.