The fishy ones , then yes , single trays . The veggies have a board covering part of each end which isn't seen in the lower levels ( for stacking ? ), hence I believe it to be one large box . I figure it would be a one person push cart , so what ever is on there should be movable by one person ( man , women or teenager ) . I've seen a few 30s & 40s movies with market stall scenes and the product isn't in boxes that big . Not historical fact but common sence the boxes should be easy to shift by one person IMO