Bags with a fill spout or discharge spout usually have standard dimensions of 14" diameter x 18" length. Fill & Discharge spouts can be tucked away using a closure with a drawstring. They each can be fitted with a B-Lock closure device, which quickly allows the user to close the spout. The spouts can be custom sized to meet your individual application. Spouts are often laminated on the inside in order to assist in the flow of the product when filling and discharging. Spouts are usually made with a 3 oz. fabric woven fabric, which is much lighter than the fabric of the body of the bulk bag.

There are two common styles of construction of a bulk bag, circular and upanel construction. Many times a bag is constructed with a four panel design as well. Baffles can be sewn into the inside of the bag, in order to improve filling of the bag. When a baffled bag is filled, the product flows through the baffles, and results in less bulging of the bulk bag.