How to measure pistachio Ounce?

Ounce is the international agreed measure for pistachio trade. Variety and pistachio ounce are two main factors affecting pistachio sales. In order to measure the ounce of pistachio, the number of nuts per 142 grams is divided by five and the result shows the pistachio ounce Or the number of nuts in one ounce(28.35 gr) can be counted. The lower the result, the bigger are the nuts.
• Ounce between 20~22:Extra large
• Ounce between 22~24:Large
• Ounce between 24~26:Medium
• Ounce upper 26:Small