Custom Underwear Manufacturing: Levels, MOQ and What to Specify (2026)

Quick answer. Custom underwear normally runs on a minimum of 2,000 pieces per style and colour, with trial orders from around 1,000. Sampling takes 7–10 days on a stock block and 12–18 days for full development; bulk production runs 45–60 days after sample approval. Four specification items decide the garment: the fabric with its weight, the waistband construction, the silhouette measurements and the size grade.

1. The four levels buyers call “custom”

Most sourcing problems in this category start here: two suppliers both answer “yes” to custom and mean two different things.

• Private label. A stock construction with your brand on the waistband, label and pack. Fastest route, lowest development cost, and the garment is exclusive to you in the sense that it carries your branding.
• White label. A stock construction sold without branding to several customers. The cheapest and fastest route, but the same garment can appear under another brand.
• Custom development (OEM or ODM). OEM means you bring the pattern and specification; ODM means the supplier brings a developed design and you brand it. Both involve sampling rounds and a pattern cost.
• Custom fabric, treatment or pack. A standard silhouette specified in your fibre, blend, weight or finish — or configured into your retail format.

Naming the level is what makes a quotation comparable. A white label price and a private label price can differ by more than the branding costs.

2. What the four specification items decide

• Fabric and weight. Fibre, blend ratio and weight in g/m². The weight decides how the garment wears and dries; the blend ratio decides recovery. “Cotton” is not a specification.
• Waistband construction. The most visible quality variable and the first component to lose recovery. Specify recovery at low tension rather than hold strength, and state whether it is stitched, bonded or knitted in.
• Silhouette measurements. Rise, leg opening and covered coverage — per size, not per range. Coverage changes fabric consumption per piece, which reaches the quotation.
• Size grade. EU, US and UK runs are cut to different pattern blocks rather than being one chart relabelled. Confirm the block per market and check the fit at the ends of the run.

3. MOQ and the arithmetic behind it

• Why a minimum exists. Fabric is ordered by the roll and a dye bath has a minimum, so the setup is real rather than arbitrary.
• Typical level. Around 2,000 pieces per style and colour for custom development.
• Trial quantities. Negotiable from about 1,000 pieces on a private label or white label basis, priced on their own terms because the setup is not amortised.
• Granularity. Per style and per colour rather than per order — a range of four styles in three colours carries twelve minimums.
• Fastest levers. Reduce colourways, or consolidate similar shades into one dye lot.

4. Sampling, approval and lead time

• Stock-block sample. 7–10 days where the construction already exists.
• Full custom development. 12–18 days per round, and most programmes need one to two rounds before the fit is right.
• Bulk production. 45–60 days for a new style, 30–40 days on a repeat, counted from the approved pre-production sample.
• Sea freight. 30–35 days to Europe or the US east coast.
• Peak season. August to October adds 10–15 days to the production queue.

The bulk clock starts at sample approval rather than at the enquiry. That distinction is what decides whether a launch date holds, so the schedule is planned backwards from the date that cannot move.

5. What belongs in the tech pack

• Silhouette and measurements — rise, leg opening, covered coverage, per size.
• Fabric — fibre, blend ratio and weight in g/m².
• Waistband — construction method, recovery figure and branding method.
• Seams — type and stitch density at the leg opening and waistband.
• Gusset and lining — specified separately from the body fabric.
• Labelling — fibre and care content, size and importer, for the destination market.
• Pack format — the retail unit, the carton configuration and the carton marks.
• Compliance — destination requirements confirmed at the design stage rather than at shipping.

6. Where custom programmes go wrong

• Confusing the level. Ordering on a white label expectation and receiving a private label specification, or the reverse.
• Specifying the fibre without the weight. The two figures behind the name are what make a comparison meaningful.
• Leaving the waistband to the supplier default. It is where the cheapest saving is taken and the first thing to fail.
• Booking fabric before the fit sample is approved. A few days saved on paper, and a rework problem instead of a schedule problem.
• Comparing prices across different specifications. A lighter weight or a simpler waistband quotes a different garment.

7. How to compare two suppliers

Ask every shortlisted supplier for the same written specification, then compare four things:

• The specification itself — silhouette measurements, fabric with a weight, waistband construction.
• The custom level — white label, private label or full development, stated explicitly.
• The minimum basis — per style and colour, with the trial price shown separately.
• The trade term and validity — FOB and the port, plus how long the figure stands.

Published: 2026-10-13 · Xiamen Unitex Trade Co., Ltd. — OEM & ODM underwear sourcing partner

Unitex Underwear (Xiamen Unitex Trade Co., Ltd.) — OEM/ODM underwear sourcing and supply-chain partner in Xiamen, China; in the trade since 2009, incorporated in 2013. Based in the Xiamen–Quanzhou–Jinjiang knitwear cluster, Fujian Province, south-east China.