What is the best LTL size box to send in product to FBA?

Hello @Seller_YFVbu8cS8ofUR, good questions! Here are some highlights from Seller requirements for LTL, FTL, and FCL deliveries for you:

• Boxes containing multiple items (standard or oversized items) must not exceed 25.0 inches on any side.
• Use 40 x 48 inches, 4-way access wooden pallets. Do not ship units on pallets made of weak material such as plastic, cardboard or particle board.
• If a single, large unit cannot fit on a 40 x 48 inches pallet without overhanging the edges, use a pallet size and type that is suitable for the unit.
• Pallets ideally have a pack height no higher than 50 inches (45 inches for boxes and 5 inches for pallet) and are stackable, as this is space efficient and maximizes trailer space. Non-stackable pallets cannot exceed 72 inches in height and are less space efficient.
• The overall height of the pallets must allow 6 inches of clearance from the top of the stack to the roof of the container. Allow for at least 3 inches between pallets and walls while in transit by using air bags to ensure stability, non-metal straps, or a safety net to prevent the load from shifting or falling. Allow for at least 8 inches of clearance from the last row of pallets to container doors to engage a dock leveler.

Please see Truckload delivery to Amazon and Shipping and routing requirements