Knix Heavy in every brand's language
By Knix's own published claim, its Heavy tier holds 36–63 mL Data quality grade C, conflicting / unconfirmed claim. Tier names don't transfer between brands - millilitres do. Here is the smallest tier in each other brand whose claimed capacity covers it.
The source claim
Knix Heavy: 4-7 super tampons (collection page, re-confirmed 2026-06-11; blog says 3-6; Super Leakproof No-Show Bikini PDP states 'Now absorbs about 6 super tampons')
The covering tier in each brand
“Covering” means the smallest tier whose claimed maximum meets the middle of Knix Heavy's range (36–63 mL). Grades: A = brand publishes mL, B = converted from counts at a stated basis, C = conflicting or unconfirmed.
| Brand | Covering tier | Claimed capacity | Grade |
|---|---|---|---|
| Thinx | All Day | 100 mL | Data quality grade A, brand publishes mL |
| Modibodi | Super | 50 mL | Data quality grade A, brand publishes mL |
| Saalt | Super | 40–50 mL | Data quality grade B, converted from tampon counts |
| Proof (Proof by Always) | Overnight (Hi-Rise / Boyshort) | 45 mL | Data quality grade B, converted from tampon counts |
| Ruby Love | Period underwear (one level) | 12.5 mL | Data quality grade B, converted from tampon counts |
| The Period Company | Heavy | 45 mL | Data quality grade B, converted from tampon counts |
| Bambody | High Absorbency | 10 mL | Data quality grade C, conflicting / unconfirmed claim |
| Aisle | Super (Heavy / overnight) | 40 mL | Data quality grade A, brand publishes mL |
| WUKA | Super Heavy | 60 mL | Data quality grade A, brand publishes mL |
| Rael | Reusable Boyshort | 15–25 mL | Data quality grade C, conflicting / unconfirmed claim |
| Hanky Panky | Regular | 15 mL | Data quality grade B, converted from tampon counts |
| Skims | Period Panties Brief | 15 mL | Data quality grade B, converted from tampon counts |
All figures are the brands' own maximum-capacity claims, normalized to millilitres - claims made comparable are still claims, not lab measurements (the only blood-component study, BMJ Sexual & Reproductive Health 2023, measured far lower effective capacity than marketing figures). Sources, conversion rules, and verification dates live in the methodology.
Other Knix tiers
Translate your own flow, then shop it
Tier names are a starting point — for your real number in your own words, use the live translator. Or jump straight to Knix.