Shanhao Undies | Certified Period Underwear Manufacturer
  • Home
  • OEM Product
    • Period Panties
      • Hipster
      • Bikini Brief
      • High Waist
      • Mid Waist
      • Thong
      • Boxer Short
      • Sleep Overnight
    • Women Ordinary Panties
    • Women’s Bras
    • Period Swimwear
    • Maternity Bra & Panties
    • Women Incontinence Underwear
    • Men Incontinence Underwear
    • Menstrual Pads
    • Dance Underwear
    • Sleepwear
    • Sportswears
    • WetBags
  • For Wholesale
    • Light Flow Panties
    • Medium Flow Panties
    • Heavy Flow Panties
    • Normal Panties
  • Ship From USA
  • About Us
    • Team members
    • F.A.Qs
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  • Blog
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  • Home
  • OEM Product
    • Period Panties
      • Hipster
      • Bikini Brief
      • High Waist
      • Mid Waist
      • Thong
      • Boxer Short
      • Sleep Overnight
    • Women Ordinary Panties
    • Women’s Bras
    • Period Swimwear
    • Maternity Bra & Panties
    • Women Incontinence Underwear
    • Men Incontinence Underwear
    • Menstrual Pads
    • Dance Underwear
    • Sleepwear
    • Sportswears
    • WetBags
  • For Wholesale
    • Light Flow Panties
    • Medium Flow Panties
    • Heavy Flow Panties
    • Normal Panties
  • Ship From USA
  • About Us
    • Team members
    • F.A.Qs
    • Gallery
    • Product Inquiry Form
  • Blog
  • Contact Us

Category: Product

Period underwear absorbency levels showing Light, Medium, Heavy, and Super Heavy protection
2026-11-052026-11-06Product

Period Underwear Absorbency Guide: How to Specify Absorbency in ml for Your OEM Order

Intro Absorbency is the one specification that decides whether a period underwear line sells or gets returned — and it is also […]

Maternity and nursing bra OEM manufacturer – comfortable private-label nursing bra design
2026-11-052026-11-06Product

Maternity & Nursing Bra OEM: 7 Things Buyers Should Verify

Choosing the right maternity nursing bra manufacturer is about more than finding a comfortable design. For maternity brands, retailers, and wholesalers, the […]

Functional-Underwear-Solutions
2026-11-042026-11-06Product, Testimonials

One Functional Underwear Manufacturer, Multiple Product Solutions

Why retailers and private-label brands are choosing one manufacturing partner for period underwear, period swimwear, incontinence briefs, and maternity underwear. Table of […]

Organic Cotton Period Underwear OEM Guide for Brands
2026-09-292026-11-07Product, Testimonials

Organic Cotton Period Underwear: OEM Guide for Brands

In the feminine care market, “organic” has moved from a nice extra to something many shoppers expect from premium brands. Customers read […]

Choosing a Period Swimwear Manufacturer
2026-09-282026-11-06Product

5 Questions to Ask Before Choosing a Period Swimwear Manufacturer

  Choosing a period swimwear manufacturer is not the same as choosing a regular swimwear factory. A normal swimsuit needs comfort, fit, […]

Period Activewear Gusset Design
2026-09-282026-11-06Product, Testimonials

Period Activewear Gusset Design: Do Running, Gym, Hiking and Cycling Need Different Gussets?

When developing period activewear, one question often comes up: can the same gusset design work for running, gym training, hiking and cycling? […]

bamboo vs cotton vs modal period underwear
2026-09-222026-11-06Product, Textile Fabric

Bamboo vs Cotton vs Modal Period Underwear: A Fabric Guide for OEM Buyers

  Table of Contents Bamboo, Cotton and Modal: What Buyers Compare Bamboo vs Cotton vs Modal Comparison Softness, Breathability and Moisture Skin-Safety […]

Can Period Underwear Survive 50 Washes? Shanhao graphic highlighting absorbency, leak protection, fabric, and elasticity
2026-09-212026-11-06Product, Testimonials

Your Period Underwear Looks Good But Can It Survive 50 Washes?

A pair of period underwear can look perfect when it is brand new. But for reusable underwear, appearance is only the beginning. […]

Teen Period Underwear A Practical Guide for Brands
2026-09-172026-11-07Product

Teen Period Underwear Manufacturer | OEM & Private Label

Choosing the right period underwear for teenagers is about more than just absorbency. Fit, comfort, fabric, leak protection, and easy care all […]

Quality control inspection at the Shanhao Undies factory
2026-08-072026-11-06Product

5 Critical Quality Control Points in Period Underwear Manufacturing

In period underwear manufacturing, quality control determines product performance, leak protection, absorbency reliability, and customer trust. Unlike regular underwear, period underwear contains […]

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Shanhao Knitting

Shantou Shanhao Knitting Co., Ltd. is a factory in Shantou City with its sales department in Shenzhen. We specialise in reusable leakproof period underwear, incontinence wear and maternity garments, producing 300,000 panties and 200,000 bras every month for brands across Europe, Australia, the Americas and South Africa.

Products

  • Women Period Panties
  • Women Incontinence Underwear
  • Men Incontinence Underwear
  • Maternity Bra & Panties
  • Period Swimwear
  • Menstrual Pads
  • Dance Underwear
  • Wet Bags

Company

  • About Us
  • Team Members
  • F.A.Qs
  • Gallery
  • Ship From USA
  • Blog
  • Product Inquiry Form
  • Contact Us
  • Privacy Policy

Contact Us

  • Phone / WhatsApp+86 181 2512 1337
  • Emailrose@shanhaoundies.com
  • Sales officeB1105, ZhanTao Technology Building, Longhua District, Shenzhen, Guangdong, P.R. China
  • FactoryXianbohuan East Road, Gurao Town, Chaoyang District, Shantou City, Guangdong, P.R. China

Copyright © 2026 Shantou Shanhao Knitting Co., Ltd. All rights reserved.

ISO 9001OEKO-TEX 100GOTSBSCIGRS

Flow Guide

Choose your flow type based on the number of pads, tampons or cups you use in approx. 12 hours.

1pad
Light
3pads
Medium
4pads
Heavy
5pads
Super Heavy
1tampon
Light
4tampons
Medium
5tampons
Heavy
7tampons
Super Heavy
½cup
Light
1cup
Medium
2cups
Heavy
2½cups
Super Heavy

These are guide figures, not medical advice. Absorbency is measured under lab conditions and real-world results vary with fit and activity. If your flow soaks through in under two hours, speak to a healthcare professional.

Size Chart

Find your true-to-size fit:

SizeUSUKEUHip (cm)Waist (cm)
XS4–68–1036–3888–9266–70
S6–810–1238–4092–9670–74
M8–1012–1440–4296–10074–78
L10–1214–1642–44100–10478–82
XL12–1416–1844–46104–11082–88
2XL14–1618–2046–48110–11688–94
3XL16–1820–2248–50116–12294–100
4XL18–2022–2450–52122–128100–106

Swipe sideways for EU, hip and waist

How to measure your size

Waist

Wrap the tape around the narrowest part of your natural waistline.

Hip

Measure around the fullest part of your hips with feet together.

Fit tip

Between two sizes? Size up for a relaxed, overnight-ready fit.

Measurements are body measurements, not garment measurements. Tolerance is 1–2 cm on finished garments. For private-label orders we can build to your own size spec.