Prevent damage to forms, catalogs, letterhead and other printed material by using the right size carton. Sold and shipped flat in bundle quantities. Overall Dimensions: 8". 32 ECT. These cartons are the industry standard. Strong, durable corrugated fiberboard. 200#/ECT-32 (Edge Crush Test) - holds up to 65 lbs. Meets most mailing and shipping carrier specifications. Contains a minimum of 30% recycled content. Staples Brand 100% Satisfaction Guaranteed. These cartons were designed to fit the most popular paper sizes.