Standard Size Canada Field Goose Shells (6 Pk) You’ll love the convenience and looks of this a heavy duty, field shell goose. It was designed with awesome feather detail by an award winning, professional wildlife carver. The standard size Field shells are 21 inches breast to tail and 11 inches wide. All Canada models come with field tested, durable black flocked heads with white painted cheek patches. Head positions include 1-Relaxed Sentry, 2-Preener and 3-Resting heads. This new field shell offers unmatched portability and realism.