small
Your brain.
4 cm by 6 cm
1.6 cm
A nodule more than 2 cm in diameter is called a tumor.
there are apprx. 2.54 cm to the inch - therefore a 5 cm tumor would be just under 2 inches in length
3.5 cm
Depending on where it is located within the body. If it is in your abdomen then yes it is small, but if it is within your brain that is somewhat large. Compared to average sized tumors in the body 3cm isn't that large.
3 cm
More than 1.
The end segment of your little finger. A smallish (flattened) grape.
Tumor