All flaps have the same length, and the two outer flaps (normally the lengthwise flaps) are one- half the carton’s width, so that they meet at the center of the box when folded. If the product requires a flat, even bottom surface, or the protection of two full layers, a fill- in pad can be placed between the two inner flaps. This is highly efficient design for many applications. There is very little manufacturing waste. The RSC can be used for most products and is the most common box style.