Product Manufacturer: Seal Line
Purchased from Bass Pro Shop, this size 30 bag is about 11" X 19" ( folded 3 times ) altogether it's about 28". Holds 1950 cu.in., weight at 1#4oz.
It looked huge at first, but when you fold it and bend it close, you can now picture your gear in there. Seems fairly thick and well built. Time will tell...