| Бока соболя светлее, чем спина. | A sable's sides are lighter than its back. |
| Мальчик спрятался за её широкими боками. | The little boy hid behind her broad hips. |
NB When the word бок functions as a subject and does not have a descriptive modifier, the construction бок у + Genitive is often preferred to (a) and (b), above: | |
| Бока у соболя светлее, чем спина. | A sable's sides are lighter than its back. |
| левый/правый бок | left/right side |
| Левый бок у соболя был светлее, чем правый. | The left side of the sable was lighter than the right. |