Shanhao Undies is a factory-direct OEM period underwear manufacturer in Shantou, China, making custom menstrual and functional underwear for brands, retailers and distributors worldwide since 2015. Our OEM range covers leak-proof period panties for light to heavy flow, period swimwear, incontinence underwear, maternity underwear and bras, all ready for your label.
We are a manufacturer, not a trading company. Knitting, dyeing, bonding and sewing are all done in-house, with a monthly capacity of 500,000 units (300,000 panties and 200,000 bras). Customisation covers fabrics (organic cotton, bamboo, modal, recycled nylon), absorbency levels, colours, logo printing and retail packaging. Production is certified to ISO 9001, OEKO-TEX, BSCI and GRS, with QC inspection before every shipment.
Shanhao Undies is a factory-direct manufacturer in Shantou, China, not a trading company. We control knitting, dyeing, bonding and sewing in-house.
We produce custom menstrual and functional underwear for brands, retailers and distributors worldwide, and we have been doing so since 2015.
Our OEM range covers leak-proof period panties for light to heavy flow, period swimwear, incontinence underwear and maternity styles, as well as bras, menstrual pads, dance underwear, sleepwear, sportswear and wet bags.
Yes. Every design is ready for your label, and you can start from any style on this page and make it your own.
Customisation covers fabrics, absorbency levels, colours, logo printing and retail packaging.
You can choose from organic cotton, bamboo, modal and recycled nylon.
Production is certified to ISO 9001, OEKO-TEX, BSCI and GRS standards, with QC inspection before every shipment.
Send us your tech pack or a reference sample and our team will reply with a quotation. You can also start from any style in the range on this page and make it your own.
Choose your flow type based on the number of pads, tampons or cups you use in approx. 12 hours.
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.
Find your true-to-size fit:
| Size | US | UK | EU | Hip (cm) | Waist (cm) |
|---|---|---|---|---|---|
| XS | 4–6 | 8–10 | 36–38 | 88–92 | 66–70 |
| S | 6–8 | 10–12 | 38–40 | 92–96 | 70–74 |
| M | 8–10 | 12–14 | 40–42 | 96–100 | 74–78 |
| L | 10–12 | 14–16 | 42–44 | 100–104 | 78–82 |
| XL | 12–14 | 16–18 | 44–46 | 104–110 | 82–88 |
| 2XL | 14–16 | 18–20 | 46–48 | 110–116 | 88–94 |
| 3XL | 16–18 | 20–22 | 48–50 | 116–122 | 94–100 |
| 4XL | 18–20 | 22–24 | 50–52 | 122–128 | 100–106 |
Swipe sideways for EU, hip and waist
Wrap the tape around the narrowest part of your natural waistline.
Measure around the fullest part of your hips with feet together.
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.
