Made by cyclists for cyclists in Bogota, Columbia, Clinch's Hip Pouch is 100% waterproof with a wide back loop to wear on a belt, a belt, and space to carry a U-Lock comfortably. 
The pouch has one inside organizer pocket as well as three small mesh pockets for small items like a phone, cards, tools, etc and a key ring.

Approximate outer dimensions: 9in X 5.25in X 2in