Abstract: A slidably adjustable, readily assemblable box having a slidably expandable base portion, front corner member posts and rear corner member posts. The front corner member posts and rear corner member posts each have portions defining relatively perpendicular slots therebetween. The front and rear corner member posts are secured to the base portion. Detachable front corner members engage the front corner member posts in their perpendicular slots. Detachable rear corner members engaging the rear corner member posts in their perpendicular slots. A detachable, slidably expandable front wall panel pivotally engages the front corner members. A detachable, slidably expandable rear wall panel engages the rear corner members. Detachable side walls engage the front and rear corner members. The front wall panel and the rear wall panel have a slidable length relatively equal to the slidable length of the base portion.