Miniature Schnauzer: crate, bed and harness size
AKC weight: 11-20 pounds (AKC Breed Weight Chart). The Miniature Schnauzer is #17 in AKC's 2025 ranking (AKC).
Crate: 30" crate (MidWest iCrate Dog Crate Size Guide (manufacturer PDF)) By weight alone the top of the AKC range fits a 24" crate, but MidWest's size guide lists the Miniature Schnauzer under its 30" crate, so this page goes up to match.
Bed: Small rectangle bed (28 x 18 in) (Orvis Dog Product Sizing Guide (Rectangle bed))
Harness: Measure your dog's chest girth, then check the Ruffwear girth chart. No breed standard lists girth.
Photo: Canarian, CC BY-SA 3.0, via Wikimedia Commons (cropped).