B&H has put together this Impact kit of Six Empty 35 lb Black Saddle Sandbags for image makers who need to outfit a small studio or add variety to the sandbags they already own.
Made of thick, black weather and water-resistant Cordura nylon, the 35 lb Saddle Sandbag is a staple in studios or on location for stabilizing light stands, booms, tripods, and backgrounds. The bag features rugged and durable assembly throughout. A double-zipper design is employed to safely contain its sand and allow its removal if necessary, as well as a webbed handle for hanging or moving.
Not sure what you mean by box dimensions but the order came in a small bag. All 6 are empty and folded. They altogether measure @ 5' (thickness of all 6) x 13 x 9 , unfilled. How much sand you need to fill the bags depends on how much weight you are trying to hold in place. There should be a formula for this somewhere.. now I need a trip to the beach!