Jumbo pistachios are larger and longer compared to round pistachios. Kallehgouchi pistachio has a long history in cultivation as its been growing for more than 4000 years. Jumbo pistachios are available in the following sizes: 18-20, 20-22, 22-24, 24-26, and 28-30.

Closed shell pistachio :
This type of Iranian pistachios is naturally closed and has not opened yet. Through process of shelling closed shell pistachios become to natural kernels through a mechanically procedure. All type of pistachios has closed shell type too and the yield kernels are 48-50%.