This sturdy 35mm SLR-appropriate bag is ready for its next tour of duty.  Rugged nylon construction.  Two main zippered compartments, one slimmer than the other.  External zippered pocket fits extra rolls of film or accessories.  Cross-body carrying strap is adjustable.

See photos for dimensions; external dimensions are roughly 10" wide x 5" deep x 8" high, plenty big enough for a standard 35mm SLR setup.