Dimensions 41-Cubic Inches, 6.25 x 2 x 3.25-Inch (length x width x height). Designed originally for triathletes (and ours still works great for that use), our top tube bag is a great add on to keep your must-haves (phone, wallet, keys) within reach. The clear top allows you to see what is in there while keeping it all dry. Plenty of room for race tools, food, or camera, phone, etc.