The design of Sporteer Modular Armbands allows customization without purchasing an entire armband and ensures a perfect fit on every arm, whether the armband is worn directly on the arm or over clothing.
Strap Size Arm Size (upper arm circumference)
Small 8 - 10 inches (20 - 25 cm) - For THIN arms or wrists
Medium 10 - 14 inches (25 - 36 cm) - Fits most arms/most common size
Large 13 - 18 inches (33 - 46 cm) - Fits large arms or over clothing
Extender + 4 inches (10 cm)