What's the overall look of the room you are going for? What chairs are you using with your dining table? That's a pretty modern fixture - so depending on the overall look of your dining room - that could be a good thing, or could feel too cold for the rustic nature of the live edge table. -

The size of the 55" would work well for the size of the table - to strictly answer the size question.

i haven't purchased chairs yet either, but am looking towards a more modern/mid century look. I love the combo of modern and rustic. What do you think about the dimensions with a 10 ft table? Thanks!