| Parameter | Specification |
| Kernel Size | Small to large (5–15 mm length) |
| Kernel Shape | Round, Dent, Flint, Pop, Sweet |
| Kernel Color | Yellow, White, Red, Purple, Blue, Multicolor |
| Texture | Hard (flint), Soft (dent), Waxy |
| Moisture Content | ≤14% (standard for safe storage) |
| Foreign Matter | ≤1.0% (by weight) |
| Broken Kernels | ≤5.0% (depends on quality grade) |
| Immature/Damaged Kernels | ≤2.0% |
| Test Weight (Bulk Density) | 720–760 kg/m³ |
| 1000-Kernel Weight | 200–400 grams (varies by variety) |
| Smell | Fresh, free from foul or musty odors |
| Surface | Smooth or slightly rough |
| Color Uniformity | Uniform within variety |