Do Saalt and Modibodi use the same absorbency labels?

No. Saalt publishes 4 current tiers (10–50 mL across the range) and Modibodi publishes 3 (20–50 mL). Even where the words overlap, the millilitres differ, which is exactly why this page compares them in millilitres with a data-quality grade on every number.

How do Saalt and Modibodi sizes compare?

Saalt runs true to size; Modibodi has no single consistent sizing direction. Both size from your hip measurement, so the size finder gives your size in each brand directly rather than guessing from the other brand's number.

Saalt vs. Modibodi

How Saalt and Modibodi period underwear compare on the only thing that travels across brands - capacity in millilitres - plus how each one's sizing runs. No brand's thumb on the scale.

Updated 2026-06-12 · Every capacity is the brand's own claim, graded and dated

Saalt and Modibodi top out at nearly the same claimed capacity - about 50 mL for Saalt and 50 mL for Modibodi at their highest current tiers. The bigger difference is how they label the steps below the top: compare the millilitres at each tier rather than the words, because a tier name like "Heavy" is not the same capacity at the two brands.

Absorbency tiers, side by side

Saalt

See Saalt

Tier	Capacity	Grade
Light	10 mL	Data quality grade B, converted from tampon counts
Regular	15 mL	Data quality grade B, converted from tampon counts
Heavy	20 mL	Data quality grade B, converted from tampon counts
Super	40–50 mL	Data quality grade B, converted from tampon counts

Verified against Saalt's own pages 2026-06-11

Modibodi

See Modibodi

Tier	Capacity	Grade
Light	20 mL	Data quality grade A, brand publishes mL
Moderate	30 mL	Data quality grade A, brand publishes mL
Super	50 mL	Data quality grade A, brand publishes mL

Verified against Modibodi's own pages 2026-06-11

Claims, not lab measurements

Every capacity above is the brand's own maximum claim, typically from a saline saturation test. The only published study with real blood components (BMJ Sexual & Reproductive Health, 2023) measured period underwear holding about 1 to 3 mL before leaking - far below these maximums. Use the numbers to compare the two brands like for like, not as a leak-free guarantee.

Sizing

Saalt runs true to size; Modibodi has no single consistent sizing direction. Both brands size from your hip measurement, so rather than converting one brand's size into the other's, the size finder gives you your size in each directly.

Saalt: No explicit runs-small/large statement on the main Saalt Wear size chart page; waist is "measured at your belly button" and hips "measured around the widest part of your hips." Bra

Modibodi: Could not verify. No Modibodi-owned source (size guide or support FAQ) states whether sizing runs small, large, or true-to-size. The size guide notes only that measurements "refer

Quick answers

Is Saalt or Modibodi more absorbent?: Saalt and Modibodi top out at nearly the same claimed capacity - about 50 mL for Saalt and 50 mL for Modibodi at their highest current tiers. The bigger difference is how they label the steps below the top: compare the millilitres at each tier rather than the words, because a tier name like "Heavy" is not the same capacity at the two brands. And remember these are saline-lab maximums, not leak-free guarantees - the only blood-component study measured far lower real capacity.
Do Saalt and Modibodi use the same absorbency labels?: No. Saalt publishes 4 current tiers (10–50 mL across the range) and Modibodi publishes 3 (20–50 mL). Even where the words overlap, the millilitres differ, which is exactly why this page compares them in millilitres with a data-quality grade on every number.
How do Saalt and Modibodi sizes compare?: Saalt runs true to size; Modibodi has no single consistent sizing direction. Both size from your hip measurement, so the size finder gives your size in each brand directly rather than guessing from the other brand's number.

Skip the comparison - get your answer

Tell the translator your flow and it gives the covering tier at both Saalt and Modibodi. Tell the size finder your hip and it gives your size in each.

What absorbency do I need?Find my size