Size Guide

Find your perfect fit with our comprehensive size guide. All Fastarry activewear uses standard US sizing with a compression fit. Each product page also has a specific size chart — this guide covers general sizing across our collections.

Leggings & Shorts

Size Waist (in) Hips (in) Weight (lbs) Weight (kg)
XS 22–24 32–34 80–95 36–43
S 24–27 34–37 95–120 43–54
M 27–30 37–40 120–140 54–64
L 30–33 40–43 140–165 64–75
XL 33–36 43–46 165–185 75–84

Sports Bras & Crop Tops

Size Bust (in) Underbust (in) Cup Size Weight (lbs)
XS 28–31 24–27 AA–A 80–95
S 31–34 27–30 A–B 95–120
M 34–37 30–33 B–C 120–140
L 37–40 33–36 C–D 140–165
XL 40–43 36–39 D–DD 165–185

Sets (2-Piece)

Our sets are sold as a complete unit in one size. The sizing follows the same chart as leggings/shorts above. If you need different sizes for top and bottom, we recommend purchasing the pieces separately.

How to Measure

📏 Waist

Measure around the narrowest part of your natural waist, usually just above the belly button. Keep the tape snug but not tight.

📏 Hips

Measure around the fullest part of your hips and glutes. Stand with feet together for the most accurate measurement.

📏 Bust

Measure around the fullest part of your chest, over your bra. Keep tape level and parallel to the floor.

📏 Underbust

Measure directly under your bust, where your bra band sits. This determines your band size for sports bras.

Fit Tips

  • Between sizes? Size up for a relaxed feel, stay true to size for compression/sculpting.
  • Prefer buttery-soft? Try AirCloud or StarryCloud — they have the most relaxed fit.
  • Want maximum compression? SculptFlex and VelvetCurve run slightly tighter for body contouring.
  • First time buying? Check the Model Info and Weight Recommendation on each product page.
  • Unsure? Email order@fastarry.com with your height, weight, and usual size — we'll recommend the right fit.

Size Comparison with Other Brands

Fastarry Lululemon Gymshark Nike US Standard
XS 2 XS XS (0–2) 0–2
S 4–6 S S (4–6) 4–6
M 8–10 M M (8–10) 8–10
L 12–14 L L (12–14) 12–14
XL 16 XL XL (16–18) 16–18

Note: Sizing varies slightly between product lines. Always check the specific product's size chart for the most accurate fit. If you need personalized help, contact order@fastarry.com.