A “hand of banana“ /sapad/ typically consists of 10-15 individual bananas, also known as "fingers", that are attached to a central stem. Each finger is a single banana, and they are usually curved and tapered, with the tips pointing upwards.
A "bunch of bananas" /bolig/ refers to a larger collection of hands, typically 3-6 hands, that are tied together at the stem. A bunch can contain anywhere from 30-90 individual bananas, depending on the size and variety of the bananas