Each type of pistachio produces and goes to the market in different sizes.
In the following, you can see the available sizes of 5 main types of pistachios.

1. Akbari Pistachio: sizes 18/20 – 20/22 – 22/24 – 24/26
2. Ahmad Aghaei Pistachio: sizes 22/24 – 24/26 – 26/28 – 28/30
3. Koleghouchi Pistachio: sizes 18/20 – 20/22 – 22/24 – 24/26
4. Fandoghi Pistachio: sizes 26/28 – 28/30 – 30/32 – 32/34
5. Badami Pistachio (white pistachio): sizes 26/28 – 28/30 – 30/32 – 32/34

Each of these types of pistachios can divide into two general categories:

• Natural Open pistachios
• Mechanical Open pistachio

NO pistachios are Open-Mouth pistachios that are naturally harvested from the tree.
But among the open-mouth harvested pistachios, some pistachios are close-mouth.
Using mechanical methods and cold water pools, the mouth of close pistachios is opened, this type of pistachio calls MO pistachios.

Obviously, The prices to buy MO pistachio nuts are really lower than NO pistachios. But the quality of MO pistachios is lower as well.

MO pistachios are known in world markets as “Class C” pistachios.

The main shopping centers of Iranian pistachios are Kerman and Khorasan provinces.

Of course, usually in each region, a special type of pistachio is producing and selling in the market.
For example, the Anar region in Kerman province is known as the largest center of Akbari pistachio production.

While the center of production of Koleghoochi pistachio can be introduced as Sabzevar city in Khorasan Razavi province.