These pearls measure 10mm exactly, and are near round -- this just means they don't roll perfectly if loose, but on ear look just as round pearls would. The color is a bright peacock, with lots of rainbow overtone. 
 
Please note, Tahitian pearls are difficult to photograph, and display the easily visible peacock effect under soft, broad lighting;  normal day to day conditions usually do not show the pearls this vividly. The pearls match well, but multiple images are shown here to rotate the leftmost pearl slightly.
 
(IMG 20235176- 20235177)