Looks like a space for a rectangular table to me and you will have the greatest number of options with a rectangular table. Get the dimensions for tables you like and use painters tape to put the outline on your floor (or stack boxes for a 3-D effect). You just want to model it in some way so you get the feel for how much space it will take up. Allow three feet around the table for chairs (and pulling out chairs). Decide which size you're comfortable with. I don't know how many people you need to be able to seat every day. If you occasionally need to be able to seat more, make sure the table would still fit with a leaf, but that could be on the tight side if it's infrequent. If everyone is used to being able to walk through empty space they may have to get used to a new traffic pattern when there is a table there, but this house was clearly designed to have a table there.

Why not use the folding table you have to decide on size, shape and location of table? Move it around and try it out for a few days. Lay some cardboard on top if you want to simulate a wider or longer table.

I would also try out a 60" round table. Use a smaller folding table and put cardboard on top. You have a lot of straight lines and rectangles, so a round shape might help soften the space a bit.

Pretty space . I think rectangular will work best there. if hou dont want to have a lbig table all the time , or dont need seating for a lot of peope majority of the time, you can consider an extendable dinig table. you certainly have the room for amole seating when needed, but dont need to have jt all the time if youd rather stay smaller for the day in and day out of living. I love canadel furnitire. beautiful quality and tons of choices to make it how you want. git my dining room from there and no regrets

BeverlyFLA : That looks so nice…. ❤️. thank you!

I would do a round table and buffet that table could have leaves if you want but I love round tables for really enjoyble dining with friends. A nive long buffet a great piece of art and afabulous chandelier . I do not like rugs under dining tables and for sure not under one that can be enlarged.

Wonderful space, I love the color palette! I think you won't go wrong with what BeverlyFLADesigner suggested, it will look amazing!