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
    • Gallery
    • Product Inquiry Form
  • Blog
  • Contact Us
0
  • 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
10 Red Flags When Choosing a Period Underwear Manufacturer (and How to Check Them)
2026-09-302026-09-28Testimonials

10 Red Flags When Choosing a Period Underwear Manufacturer (and How to Check Them)

Most sourcing problems don’t come from bad luck. They come from skipping a few checks because a supplier sounded professional, sent a […]

Period Underwear Market Trends 2026 A Brand Guide
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Period Underwear Market Trends 2026: What Brands Need to Know Before Sourcing

  Search for the period underwear market size and you’ll find a dozen different answers. One report says a few hundred million […]

Organic Cotton Period Underwear OEM Guide for Brands
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Why Brands Choose Organic Cotton for Period Underwear (OEM Guide)

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
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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, stretch, […]

Period Activewear Gusset Design
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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
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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 […]

private label period underwear manufacturer
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10 Questions to Ask Before Choosing a Private Label Period Underwear Manufacturer

Table of Contents 1. What Is Your MOQ? 2. Can You Make Custom Period Underwear? 3. How Long Does Sampling Take? 4. […]

Can Period Underwear Survive 50 Washes? Shanhao graphic highlighting absorbency, leak protection, fabric, and elasticity
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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. […]

Verify a Factory’s OEKO-TEX Certificate Before You Order
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OEKO-TEX Class I vs Class II for Period Underwear: What Buyers Should Know

When sourcing period underwear, product safety and certification are important for brands, retailers, and wholesalers. One certification you may see from suppliers […]

Teen Period Underwear A Practical Guide for Brands
2026-09-172026-09-17Product

Teen Period Underwear: A Practical Guide for Brands

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

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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 500,000 panties and 100,000 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

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.