The rail is included
Wardrobe garment boxes include a plastic hanging rail. Sizes on that category are internal dimensions: length, width, then height. A removal carton has no rail. Hanging clothes crease in it.
Folded clothes
Jumpers and linen can go in a double wall removal carton, with paper between the layers if you want them unmarked. That is a fill-and-stack carton, not a hanging one.