It measures 15x15x15.

I have the Mountainsmith Modular Hauler system, which is a (too) floppy rectangular holder, which four 15x15x7.5" cubes fit into. I have my helmet, shoes, gloves, computer, glasses, pump in one. I have other every day stuff in another. I have rain gear in another. I have cold gear in another. Then in the house I have one for reflective/randonneuring gear, like lights, batteries, leg and arm reflectors, food, etc. Then I have the cooler cube! So I can put any four in the hauler, which lives in the Rodeo. I get to it through the side door. It's a cool idea- I just wish the hauler and cubes were stiffer- they stand up when full, but collapse down when not. Probably supposed to be that way. They have little clear pockets on the tops, too, that I use to stuff my bike maps in.

If I didn't have that, I'd have the bike cube.

Caligurl, I used to have a big bag I just threw everything in. I had way too much stuff I never used in it. The bike cube would be _so_ organized!

Nanci