The Nike+ FuelBand sizes include: Small (5.79 inches/147 mm circumference), Medium/Large (6.77 inches/172 mm circumference), and Extra Large (7.76 inches/197 mm circumference). The FuelBand should fit snugly and comfortably on your wrist without being restrictive. For more details, check out the FuelBand size guide.
The majority of women should purchase a Small FuelBand. Women who are 5'8" (173cm) to 6'1" (185) and weigh 165-230 pounds (75-104 kg) should purchase a Medium/Large.
Most men should purchase a Medium/Large FuelBand. Men who are 6'4" (193) or taller and weigh 240 (109 kg) pounds or more should purchase an Extra Large.
See the FuelBand's technical specifications, available near the bottom of the product description page.
To accommodate a range of wrist sizes, the FuelBand comes with an 8mm and a 16mm link. Learn more about adjusting the FuelBand size.