How Much Blood Can Period Underwear Hold?

When it comes to period underwear, one of the most common questions we hear from both consumers and retail buyers is: how much blood can period underwear actually hold? The answer depends on the style of underwear and the size of the absorbent area.

At LYNMISS, we design and manufacture a wide range of washable and reusable period underwear that balance comfort, absorbency, and style — tailored both for individual needs and for our B2B partners around the world.

Absorbency Depends on Style and Cut

Different styles of period underwear are designed with different absorbent zones and coverage areas, which directly affect how much menstrual flow they can hold.

• Thong Period Underwear:
  Ideal for light flow days or as a backup to tampons or cups. On average, thongs hold around 10ml of blood — roughly the equivalent of 2 regular tampons.

• Bikini and Brief Styles:
  These are the most common designs, offering moderate absorbency of around 20–30ml. They’re perfect for day-to-day wear, giving comfort and leakproof protection without bulk.

• Boyshort Period Underwear:
  Designed with full coverage and a larger absorbent panel, boyshorts can hold up to 40–50ml of blood. They are ideal for heavy flow nights, longer wear, or anyone who values extra protection and comfort.

 Why Absorbent Area Size Matters

The larger the absorbent area, the more capacity the underwear has. For example, a thong has a narrow gusset, limiting absorption, while a boyshort provides extended coverage across both the front and back panels.

This makes boyshorts the go-to option for buyers seeking maximum absorbency and comfort for heavy flow customers.

LYNMISS Manufacturing Advantage

At LYNMISS Functional Underwear Factory, we don’t just produce generic products — we help global B2B buyers, private labels, and brands design custom period underwear solutions with the following advantages:

• Custom Absorbency Levels (10ml to 50ml) tailored to your market needs

• Diverse Styles (thong, bikini, high-waist, boyshort) with fashionable designs

• Certified Fabrics including OEKO-TEX bamboo, cotton, and breathable leakproof layers

• OEM/ODM Services for global retailers, from design to bulk production

• Sustainability Focus — reusable, washable, and eco-friendly manufacturing processes

By working with us, you can provide customers with reliable, stylish, and sustainable period underwear that truly performs.

Final Thoughts

So, how much blood can period underwear hold?

• Thongs: around 10ml

• Bikinis/Briefs: around 20–30ml

• Boyshorts: up to 40–50ml

At LYNMISS, our goal is to combine science with comfort, offering absorbent solutions that empower wearers — while supporting global buyers and retailers with reliable manufacturing.

If you’re looking for a professional factory partner for reusable period underwear, we’d love to collaborate with you.

Visit LYNMISS Official Website for more details.