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Shelled Walnut Sizes

California shelled walnuts are available in a variety of sizes. Descriptions and size tolerances are based on the USDA Standards for Grades of Shelled Walnuts.

USDA Standard Sizes for Shelled Walnuts

Walnut Halves

Description: 7/8 or more of the kernel is intact. 85 % or more of lot, by weight, are half kernels with the remainder three-fourths half kernels.

USDA Size Tolerances: No more than 5 % smaller than three-fourths halves of which no more than 1% may pass through 16/64 inch (6.35 mm) round screen hole.

Walnut Pieces and Halves (Halves and Pieces)

Description: 20% or more of lot, by weight, are half kernels (7/8 or more of the kernel is intact).

USDA Size Tolerances: No more than 18 % shall pass through 24/64 inch (9.52 mm) round hole of which no more than 3 % may pass through 16/64 inch (6.35 mm) and of 3 % no more than 1 % may pass through 8/64 inch (3.18 mm) round screen hole.

Walnut Pieces

Description: Portions of kernels in lot cannot pass through 24/64 inch (9.53 mm) round openings.

USDA Size Tolerances: No more than 25 % shall pass through 24/64 inch (9.53 mm) round hole of which no more than 5 % may pass through 16/64 inch (6.35 mm) and of 5 % no more than 1 % may pass through 8/64 inch (3.18 mm) round hole included in the 5 %.

Walnut Small Pieces

Description: Portions of kernels in lot pass through 24/64 inch (9.53 mm) round openings but cannot pass through 8/64 inch (3.18 mm) round openings.

USDA Size Tolerances: 10 % will not pass through 24/64 inch (9.53 mm) round hole and 2 % pass through 8/64 inch (3.18 mm) round hole.

Typical Industry Sizes for Shelled Walnuts

Walnut Medium Pieces

Although not covered in USDA Standards, Medium Pieces are a common size classification used in the California walnut industry. No less than 98 % may pass through a 32/64 inch (12.7 mm) screen. No more than 3 % may pass through 16/64 inch (6.35 mm) screen. No more than 1 % may pass through 8/64 (3.18 mm) screen.

Walnut Meal (double diced)

The smallest form of the California walnut comes in various consistencies ranging from a coarse meal to a fine powder. Use walnut meal to dust cakes, integrate into dough and batter, and for walnut compounds. Finely ground walnuts are incorporated into pastas, added to fillings, and used as a thickening agent in sauces.

Topping Pieces

Description: Portions of kernels in lot pass through 1/4 inch (6.35 mm) square screen hole or a 20/64 inch (7.64) round screen hole.

Syrupers

Description: portions of kernel in a lot pass through 3/8 inch (9.35 mm) square screen hole or 28/64 inch (11.11 mm) round screen hole.

Handler List

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Find the complete Handler list here…