Two different products are often called an underwear multipack. A consumer pack normally contains several garments in one size, perhaps in different colours. A wholesale assortment may contain several sizes for a retailer to break down and sell. The same phrase on a purchase order can therefore produce very different inventory.
Define the sellable unit, its contents and the shipping hierarchy before calculating quantities. This article covers pack composition, size labelling and verification; for grading the garments themselves, see men’s underwear fit blocks and grading. It does not prescribe a universal size ratio: that should come from demand, availability and fit evidence in the buyer’s own channel.
Write the pack definition in plain language
A useful description is “one retail unit contains three boxer briefs, all size M: one black, one navy and one grey.” A wholesale assortment needs a different instruction: “one wholesale bundle contains six individually sellable garments in the specified size ratio.” State whether the warehouse may break the bundle and whether each garment needs its own retail identification.
Assign a pack SKU in addition to the component garment SKUs. A colour change or size substitution changes the contents and must be controlled; packers should not improvise it to use surplus stock.
A pack bill of materials
Hypothetical example: pack MP-M-01 contains three garments, all size M. This example is for quantity checking only.
| Component | Quantity per retail pack | Controlled reference |
|---|---|---|
| Black boxer brief, M | 1 piece | BB01-BLK-M and garment revision |
| Navy boxer brief, M | 1 piece | BB01-NVY-M and garment revision |
| Grey boxer brief, M | 1 piece | BB01-GRY-M and garment revision |
| Retail sleeve | 1 | Artwork revision and pack barcode |
| Approved closure or bag | 1 if specified | Material, dimensions and closure reference |
For 100 retail packs, the garment requirement is 100 pieces of each colour, 300 pieces total. If grey stock is only 90 pieces, only 90 complete packs can be assembled under this bill of materials. The remaining black and navy garments are component inventory, not completed retail units. Keep sample, test and replacement allowances outside this sellable-unit calculation so they are visible.
Extend the bill into a carton check
Assume, for illustration, 20 retail packs per carton. Each full carton then contains 60 garments: 20 black, 20 navy and 20 grey, all M. Five full cartons reconcile to the 100-pack order. If the order is 105 packs, the plan needs five full cartons and a clearly identified five-pack partial carton, not six cartons all marked as full.
| Checkpoint | Expected result | Record to retain |
|---|---|---|
| Garment to pack | Correct style, colour and measured size match each component SKU | Pack assembly check |
| Pack to label | Contents and pack size match barcode and artwork | Approved packed sample and scan result |
| Pack to carton | Retail-pack count and garment count both reconcile | Carton-level packing list |
| Carton to shipment | Full and partial cartons match total retail units | Final packing list and variance approval |
Choose a size assortment without confusing fit and stock
For consumer multipacks, each size normally needs its own pack quantity. For a wholesale mixed-size bundle, write the exact quantity of each size inside each bundle. Do not use “assorted sizes” without a breakdown. A retailer buying the assortment needs to know which slow sizes it will inherit.
Compare sales with the time each size was actually in stock. A size that sold fewer units because it was unavailable is different from one that sold slowly throughout the period. Compare return reasons separately: a grading problem requires a product correction; an excessive allocation requires a buying correction. Changing ratios cannot make an incorrectly graded garment fit.
Check destination size labels against the actual body-size chart rather than translating S, M and L mechanically. Where two styles share a pack, validate that their labelled sizes serve compatible body measurements and that the product description makes any difference clear.
Size labels and the size chart on the pack
Shoppers choose a multipack by the size printed on it, usually without trying anything on. That makes the size label and the size chart on the pack part of the pack specification, not an afterthought.
- Tie each size letter to a body measurement. The chart on the pack should show the body waist (and hip if relevant) each size is for, in the units of the destination market. Stretch underwear is smaller than the body it fits, so printing garment measurements as if they were body sizes misleads customers. See body waist versus garment waist.
- Use one size system across the range. If briefs, trunks and boxer briefs share a pack format, the same letter should mean the same body range on each, even though each style is fitted separately.
- Match the garment label to the pack. Every garment in a same-size pack carries the same size label as the pack. Check this at pack assembly, not only at final inspection.
- Define body measurements consistently. ISO 8559-1 sets out how body dimensions such as waist and hip are measured; using a defined method keeps charts comparable between styles and reorders.
The pack size chart reports the size system; it does not create it. How each size is graded is a product decision covered in men’s underwear fit blocks and grading. Clear polybags used for packs may need a suffocation warning; see polybag warning rules.
Control rework and partial packs
Keep incomplete packs in a separate area with component counts. When a garment is removed for repair or inspection, invalidate the completed-pack status until the contents are checked again. At a size or colour change, clear the packing station of old labels and loose garments. Retain a first-off packed unit for comparison.
At final inspection, draw packs across sizes, colours and cartons rather than opening only one convenient top carton. Check garments as well as packaging. A carton can carry the correct count and still contain the wrong sizes. Agree the sampling plan and treatment of an error before inspection; if a systematic mix-up is found, investigate the affected packing run rather than assuming one replacement fixes the lot.
Approve the information the customer sees
Review pack-level descriptions, component labels, fibre and care information and destination requirements together. Different constituent fabrics may require more careful wording than an all-identical pack. Do not assume outer packaging replaces required garment labels. Check any retailer packaging rules and relevant bag-warning requirements for the actual materials and dimensions.
Use the wholesale order matrix to reconcile the entire order. The private-label approval guide handles artwork ownership and release; this pack bill of materials determines what those approved labels must identify.
Sources and further reading
- ISO 8559-1:2017, Size designation of clothes: anthropometric definitions for body measurement
- eCFR, 16 CFR 303.15, Required label and method of affixing
- eCFR, 16 CFR 423.6, Care labeling of textile wearing apparel
Rules and standards are summarised from their official pages for general guidance; this is not legal advice. Check the current version and the requirements of your own market before you rely on them.
