Lunarness Fit Lab · Tool 01
Harness Size Calculator
Turn three body measurements into a starting size for Lunarness fashion harnesses. The calculation runs in your browser; measurements are not sent or stored.
Private, instant calculation
Find your starting size
Use a soft tape measure over close-fitting clothing. Keep it level and comfortably close—do not pull it tight.
Measure once, check twice
Where the tape goes
Chest / bust
Wrap the tape around the fullest part of your chest or bust, under the arms and across the shoulder blades.
Natural waist
Measure around the narrowest part of the torso, usually above the navel. Keep your body relaxed.
Full hip
Stand with feet together and measure around the fullest part of the hips and seat.
How the result works
The largest required measurement sets the size
The calculator checks each measurement against the same ready-to-wear ranges shown on Lunarness product pages, then selects the smallest size that contains all three upper limits. If your measurements span several sizes, the result flags the mismatch instead of hiding it.
This is a starting point, not a guarantee. Construction and adjustable strap range vary by product. Always check the current product page; when exact custom measurements are offered, those measurements take priority over this chart.
