The Classic MX Modular Armband fits the LG V40 ThinQ with no case or a thin case and is the best armband choice if you want the least amount of bulk on your arm while running or working out.
The Classic MX Modular LG V40 ThinQ Armband fits cases up to 162 x 83 x 10 mm.
If your case is thick and you prefer to keep the case on during your workouts, we recommend the the Entropy E8 Armband for LG V40 ThinQ.
Strap Size Arm Size (upper arm circumference)
Small 7 - 9.5 inches (20 - 25 cm) - For THIN arms or wrists only
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)