Resolved Question Does anyone now the size of the pancreatic beta Cell? I have a biology assignment in which i have to draw pancreatic beta cell and the organelles within. However to do this i need to know the size of the cell, which is very difficult to find on the internet, as the size of the islets are more common. Please Help me.... Best Answer - Chosen by Voters About 10 microns in diameter. You can follow this link and search for the word "diameter" just to be sure. It's not the first place you see the word "diameter" but keep going down the page and you'll see it. http://www.freepatentsonline.com/y2008/0\\... It's in the section called "Preparation of Islet Cell Patch"