Custom Underwear Manufacturer: Boxers, Briefs and MOQ Guide

Custom underwear manufacturer programs typically use 160–220 GSM cotton-elastane, modal or microfibre jersey with 5–10% elastane and 3–5 cm jacquard waistbands. Many factories start at 300–1,000 pcs per style and colour, sample in 10–15 days and deliver bulk in about 30–45 days after approval.

About this guide: we wrote it to help buyers brief the right factory, but Weavnora does not make underwear or intimates. Our production is heavyweight and garment-washed tees, hoodies, sweatshirts and sets; see the heavyweight T-shirts page or ask for a quote.

Underwear is one of the most repeat-purchased items in any wardrobe. When customers find a pair they like, they buy multiples and come back. That makes underwear an attractive category for DTC brands, basics labels and lifestyle brands. But underwear is intimate, close-fitting and washed constantly, so small differences in fabric, elastic and fit decide whether customers return. This guide uses a simple triangle: fabric, elastic and fit. Get all three right and the product sells itself.

What is a custom underwear manufacturer?

A custom underwear manufacturer is a factory that cuts and sews boxer briefs, trunks, briefs, boxers, bralettes and other intimates to a brand's own patterns, fabrics, waistbands and packaging, usually using stretch jersey and custom jacquard elastic. Typical programs use 160–220 GSM fabrics with 5–10% elastane, start at 300–1,000 pcs per style and colour and take about 30–45 days for bulk after approval.

Side 1 of the triangle: Fabric

Fabric decides comfort and how the underwear feels after many washes.

• Cotton-elastane jersey: breathable, familiar and affordable.
• Modal and micro-modal: very soft, smooth and cool, with good drape.
• Bamboo-based viscose: soft, popular for comfort marketing.
• Microfibre polyamide or polyester: smooth, quick-drying, good for sports.
• Organic cotton: for brands with sustainability goals.

Test pilling, shrinkage, stretch recovery and colour fastness. Our Tencel clothing manufacturer guide covers lyocell and modal fibres, and our bamboo T-shirt manufacturer guide explains bamboo-based fabrics and labelling.

Side 2 of the triangle: Elastic

The waistband is the brand's billboard and the part customers feel most. Jacquard elastic with a knitted-in logo is the industry standard for branded underwear. It needs its own design, colour matching and minimum order. Choose a width of about 3–5 cm, a stretch level that holds without digging in and a soft brushed inner face. Leg elastics should be soft or replaced by bonded or raw-cut edges for a no-show look.

Side 3 of the triangle: Fit

Underwear fit depends on rise, leg length, pouch shape and seat coverage. For men's styles, the pouch is a key comfort feature: contoured or 3D pouches give support and are often a selling point. For women's styles, rise and leg cut define the style, from briefs and bikinis to high-waist and boyshorts. All styles need a cotton gusset where appropriate. Fit testing on real bodies is essential, because small pattern changes make a big difference.

Boxer briefs vs trunks: which option fits?

These two men's styles sell the most, and many brands launch with one.

The trade-offs are coverage and versatility versus a shorter, more fashionable cut. Many brands launch boxer briefs as their hero and add trunks once they have reorder data.

Which construction details matter?

• Flatlock or coverstitch seams to avoid chafing.
• Double-layer pouch with a smooth inner seam.
• Gussets in cotton for women's styles.
• Tagless printed labels to avoid scratchy tags.
• Bartacks at stress points.

Every detail should be written into the tech pack.

How should underwear be packaged?

Underwear is usually sold in packs of one, three or five. Packaging may be a printed box, a card sleeve, a resealable bag or a recycled paper envelope. Packaging must show size, fibre content and care. Many brands use packaging to share their story and sizing guide. Because underwear is a hygiene item, packaging also needs to show that it has not been opened.

How should underwear sizes be set?

Most underwear sizes run from XS or S to XXL or 3XL, based on waist and hip measurements. Explain sizing clearly on packaging and product pages, because customers often cannot return opened packs. Our how to create a size chart for a clothing brand guide explains how to present measurements.

Which labelling and safety points apply?

Labels must show fibre content, care instructions and origin where required. Many brands choose OEKO-TEX certified fabrics and elastics because underwear sits next to skin. Avoid claims such as antibacterial unless you have testing and the claim is allowed in your market. Our care label compliance guide explains labelling for North America and Europe.

What does custom underwear cost to produce?

Main cost drivers are fabric, elastic, construction, packaging and quantity. Modal and micro-modal cost more than cotton. Custom jacquard elastic adds setup costs and minimums. Premium packaging can cost as much as the garment itself for small runs. Ask factories to quote elastic, garment and packaging separately.

How do you plan a first underwear order?

Launch one hero style in three core colours, such as black, grey and navy, in a full size range. Approve elastic first because it takes longest. Fit test across sizes and wash test the samples ten times or more to check the waistband and fabric. Order multipacks, because they raise order value and help customers commit.

Which women's underwear styles should you consider?

Women's underwear ranges are usually built around a few core cuts: briefs, bikinis, hipsters, high-waist briefs, thongs and boyshorts. Seamless or bonded edges create a no-show look under fitted clothes, while lace trims and soft elastics suit fashion ranges. Matching bralettes and lounge sets increase order value. Period underwear is a specialised category with absorbent layered gussets, and it needs extra testing and careful claims about absorbency. Start with two or three cuts in the same fabric so customers can mix and match, and add specialist styles after you have reorder data.

Questions to ask an underwear factory

• Do you produce jacquard elastic in-house or through a partner?
• Which fabrics do you stock, and what are the mill minimums?
• Can you make contoured pouches and bonded edges?
• Which wash and stretch recovery tests do you run?
• Can you pack multipacks with my printed boxes or sleeves?
• How do you keep finished underwear clean and protected before packing?

Common mistakes with underwear programs

• Choosing waistbands that roll or dig in.
• Skipping wash tests on fabric and elastic.
• Starting with too many styles and colours.
• Poor size guidance on non-returnable items.
• Ordering custom elastic too late.

Custom underwear manufacturer: typical specs and key numbers

These are typical industry estimate ranges, not quotes; confirm actual figures with your supplier for your fabric, quantity and destination.

Key takeaways

• Balance fabric, elastic and fit.
• Jacquard waistbands carry the brand but need their own minimums.
• Boxer briefs are the most common hero style.
• Package for hygiene, sizing and multipacks.
• Wash and fit test before bulk.

How Weavnora can help with the rest of your range

If your collection also includes heavyweight or garment-washed T-shirts, hoodies or sweatshirts, Weavnora can quote and sample them. Start from the heavyweight T-shirts page or share your brief; for underwear or intimates, work with a dedicated specialist. More sourcing guidance is in our custom bottoms and sets manufacturing hub.