Wholesale SKU Setup: Case Packs, Inner Packs and Order Minimums at a 3PL
Wholesale orders break at the SKU level long before they break on the dock. Here is how case packs, inner packs and order minimums get set up at a 3PL so B2B purchase orders pick cleanly the first time.
Wholesale orders fail differently than consumer orders. A direct-to-consumer mistake sends one wrong item to one buyer. A wholesale mistake sends forty cases that a retailer's receiving dock will not accept, and the entire pallet turns around.
Most of that risk is decided long before a purchase order arrives. It is decided the moment someone chooses how a product is packed, counted and sold in bulk. That is SKU setup, and inside a warehouse it is a data exercise at least as much as a packaging one.
One product, three selling units
A product that sells both direct and wholesale usually exists in three forms at the same time:
| Unit | What it is | Where it gets used |
|---|---|---|
| Each | One sellable item | DTC orders, marketplace listings |
| Inner pack | A small sealed bundle of eaches — 4, 6, 12 | Shelf replenishment, break-case picks |
| Master case | The shipping carton holding the inner packs | Wholesale POs, pallet builds |
Every one of those needs its own barcode, its own dimensions and its own weight in the warehouse management system (WMS). When only the "each" is configured, every wholesale order turns into a manual count, and inventory starts drifting the first time somebody opens a case to pull a partial quantity.
Case pack quantity is a commercial decision
Case pack size tends to get inherited from whatever the factory shipped, which is rarely the quantity buyers want to order. Two things are worth checking before it becomes permanent.
The first is how buyers actually order. If the typical opening order is 30 units and the case pack is 48, every order becomes a broken case. If the case pack is 12, that same order is a clean four-case pick.
The second is what the case weighs. A master case heavy enough to need two people slows every touch it receives for the rest of its life — receiving, putaway, picking, palletizing. Splitting the same quantity across two lighter cases often costs less in handling than it adds in corrugate.
Inner packs and the break-case question
An inner pack exists so a case can be opened without the contents becoming loose units. It is what makes a partial-case order pickable without a full recount.
The decision to make is whether you allow break-case picking at all. Both answers are defensible:
- Full cases only. Simplest to pick, cleanest inventory, fewest errors. It also means buyers must order in case multiples, which some smaller accounts will not do.
- Break case allowed. More flexible for buyers, but it needs an inner-pack barcode, a defined remainder rule and a place to put opened cases so they get picked first.
What causes trouble is leaving it undecided. When the rule lives in one person's head, opened cases end up scattered across pick faces and cycle counts stop matching. If you are weighing how partial quantities move through the rest of the operation, the mechanics are covered in more depth in our piece on how case picks, pallet builds and LTL shipments move through the warehouse.
Order minimums that match how you pick
Minimums are usually written as a dollar figure, which is a sales decision. The fulfillment side needs them written in units too, because those are what the floor works in:
- Minimum order quantity per SKU — often one case, sometimes one inner pack
- Minimum order value — the commercial floor
- Pallet rules — whether mixed-SKU pallets are allowed, and how high they may be stacked
- Rounding rule — what happens when a buyer orders 20 of a 12-pack: round up, round down, or split the case
Writing the rounding rule down matters more than which rule you pick. It is the single most common source of "we shipped the wrong quantity" disputes on wholesale accounts.
What to hand your 3PL before the first PO
Before a wholesale program goes live, your fulfillment partner should have, per SKU:
- Barcodes for each, inner pack and master case
- Dimensions and weight for all three units
- Case pack and inner pack quantities
- Break-case rules and any lot or date-code requirements
- Pallet ti-hi — cases per layer and layers per pallet
- Any buyer-specific labeling, ticketing or documentation requirements
That last line is where retail accounts differ most, and it is worth confirming account by account rather than assuming a house standard applies. Retailer-specific rules, and what happens when they are missed, are laid out in our guide to retail routing guides and chargebacks.
Where this quietly goes wrong
The failure mode is almost never dramatic. It is a SKU added mid-season with no case dimensions, so it gets estimated. It is a factory quietly changing case pack from 24 to 20 without telling anyone, so a pallet build comes up two cases short. It is one account allowed to order in eaches as a favor, after which nobody is sure which accounts may do that.
Each of those is small on its own. Together they are why wholesale orders start needing a phone call before they can ship.
Setting the units up properly once, and keeping them accurate when packaging changes, is what keeps a B2B program pickable as it grows. If you are building one out and want to see how the pieces fit together operationally, our B2B fulfillment services page walks through how wholesale orders are received, picked and shipped.
