Inside Dimensions: 5. 31" x 3. 56" x 1. 68"
Outside Dimensions: 6. 37" x 4. 75" x 2. 12"
They are the promises:
* PERFECT FOR RUGGED SPORTS - NOT FOR SWIMMING OR SUBMERGING
* Waterproof, crushproof, and dust resistant
* Easy open latch
* Rubberized liner for extra safety doubles as o-ring seal
* Automated Pressure Equalization Valve - balances internal pressure, retains water out
* Stainless steel hardware
* Carabiner
* Lifetime Assurance of Quality
* Obtainable in clear with color liner or solid
It is a good size. I have not completely tested it, but I wondered concerning the "Crush Proof" promises so we drove a Chevy Lumina above it. Case and contents (various survival stuff which include a lensatic compass) ended up undamaged. Pretty amazing.