That space is too small for either living or dining.

Good luck on your project.

My questions are:

1. How far are you into the construction phase?

2. Why are you using a dining room for a temporary living room?

3. How did you get this far?

My guest bedroom is that size. It "just" holds two twin-sized beds with a dressing table under the winter in-between, and a chest of drawers. It would be ridiculous as a LR or a DR. It's fine as a guest room as guests don't say long and I do have a folding luggage rack I put in front of the closets so they have a place for their suitcase.

The plan is to extend actually. But I was wondering if it was possible to still hold out on a size for a period of time. But based on your comments I realise the best thing will be to extend. We were planning to extend the 9.5 feet to 16ft. so can an 11.5 x 16 work for a dining?

"can 11.5 x 16 work for dining?"

That's going to be hard for anyone else to answer without seeing your floor plan, because you may need to account for walkways, door swings, etc. (Also we don't know the size and shape of the table you are trying to fit, how many people you want to seat, or if there will be other furniture in the room.) In general, I've seen guidelines of 30" to 48" from table edge to wall, with 30" being the minimum and more being better. Horizontally at least 24" per person with more at the ends (for leg room), and possibly more depending on the size of your chairs and your guests.

Create a layout drawn to scale, with your table drawn to scale in it.