If you're considering using a bench with your dining table, then you're making a good choice for a few reasons. Benches are seen as more comfortable by lots of people because they seat more people and you can be seated closer to each other, making the setting more intimate and allowing easier interaction.
If you're wondering if you can match a bench with your small oval dining table, you most certainly can. In fact, a bench is often more practical than individual chairs that can sometimes make space feel smaller and more cluttered.
On the other hand, the bench introduces a banquette seating style instead and is great if you want to maximize seating space and still create a dining area with simplistic style.