What changes by model
PRISMA / HELIOS
PRISMA and HELIOS use fixed leg loops in the reviewed charts, so thigh range is a hard shortlist boundary rather than an adjustment to solve later.
The charts contain overlaps, but a compatible waist does not compensate for a thigh measurement outside the stated band.
Reviewed model
PRISMA
| Size | Waist | Thigh | Leg loops | Listed uses |
|---|---|---|---|---|
| XS | 67.056–83.566 cm | 51.054–54.102 cm | fixed | sport, alpine |
| S | 71.12–86.106 cm | 51.054–54.102 cm | fixed | sport, alpine |
| M | 77.978–92.964 cm | 55.118–57.912 cm | fixed | sport, alpine |
| L | 85.09–100.076 cm | 58.928–61.976 cm | fixed | sport, alpine |
Reviewed model
HELIOS
| Size | Waist | Thigh | Leg loops | Listed uses |
|---|---|---|---|---|
| S | 71.12–81.026 cm | 46.99–56.896 cm | adjustable | sport, multi-pitch |
| M | 77.978–87.884 cm | 51.054–60.96 cm | adjustable | sport, multi-pitch |
| L | 85.09–94.996 cm | 55.118–65.024 cm | adjustable | sport, multi-pitch |
Read the chart with an example
These illustrative measurements show how the published rows work. They do not describe a tested person or rank comfort.
PRISMA: 85.5 cm waist, 56.5 cm thigh
Both numbers fall within size M. This is a chart match; buckle position, rise and comfort still need a physical check.
Model ranges, review date and limitations · Compare your own measurements for PRISMA
HELIOS: 82.9 cm waist, 56 cm thigh
Both numbers fall within size M. This is a chart match; buckle position, rise and comfort still need a physical check.
Model ranges, review date and limitations · Compare your own measurements for HELIOS
US-market dataset v0.1.2 · Reviewed 2026-07-20 · Next review 2026-10-20