Sizing
Thinx runs true to size; Aisle tends to run small (many people size up). 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.
Thinx: Runs true to size. Thinx states styles are "completely true to size" and recommends following the HIP measurement (measured at widest point, derriere included) for the most accurat
Aisle: Brief & Hipster: "Between sizes? We recommend sizing up." Between XL and 1X, the 1X is roomier through the waist. Thongs run LARGE in sizes 1X and 2X, so Aisle recommends sizing DO
Quick answers
- Is Thinx or Aisle more absorbent?
- By their own published claims, Thinx reaches a higher maximum capacity (up to 100 mL) than Aisle (up to 40 mL) at its highest current tier. That does not make every Thinx pair more absorbent than every Aisle pair - it means the top of Thinx's range is higher. Compare tier by tier in millilitres, not by the label words. And remember these are saline-lab maximums, not leak-free guarantees - the only blood-component study measured far lower real capacity.
- Do Thinx and Aisle use the same absorbency labels?
- No. Thinx publishes 3 current tiers (100 mL across the range) and Aisle publishes 4 (5–40 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 Thinx and Aisle sizes compare?
- Thinx runs true to size; Aisle tends to run small (many people size up). 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 Thinx and Aisle. Tell the size finder your hip and it gives your size in each.