When a person has diabetes, they need to carefully consider the contents of each meal. This can be especially true for carbohydrate-containing food, which not only includes desserts and other sweet treats, but bread, pasta, and fresh fruits.
One fruit that traditionally has been on the “avoid” list for those with diabetes is bananas. However, for the most part, bananas eaten in moderation can be safely enjoyed when a person has diabetes.

Bananas grow on banana plants that can have anywhere from 50 to 150 bananas in each bunch of fruit. The individual bananas are sold in varying sizes, from small to extra-large, the size-grading being determined by their length.
http://9jahealth.com.ng/can-diabetics-eat-bananas/