Find Your Perfect Fit
PREDICTION is built differently.
Sizing isn’t just waist — fit matters too.
Size Chart
Choose the leg fit that feels right for your thigh shape and comfort preference.
Slim doesn't mean a smaller waist — only a slimmer thigh and leg opening fit.
Ad Astra or Ryder?
Both are built with PREDICTION utility, but each series is designed for a different carry style.
Ad Astra
Maximum coverage and secure carry with dual-pocket utility.
Ryder
Lightweight everyday carry with a shorter, easy-moving profile.
Built for different thigh profiles.
Most underwear brands only change the waist size.
PREDICTION also lets you choose how the leg fits.
Relaxed, maximum comfort.
Designed for everyday comfort with a more relaxed feel around the thigh. Best if you prefer more room or have larger thighs.
Closer, tailored fit.
Same waist size, but with a slimmer leg opening for a closer fit. Best if regular boxer briefs feel loose around your legs.
Which one should I choose?
Still not sure?
Start with your normal waist size. Choose Standard for more room around the thigh, or Slim for a closer, more tailored fit.
Learn about Standard vs Slim