As much as I love sisal for the natural fibres and hardiness, I found they stained really easily. Even with water. So I've gone with jute for the look, softer feel underfoot, texture and stain hiding abilities.

Thank you for your comments! So, I was looking at a 200cm x 300cm rug since it's a 6 seater table. However, the table is only 165cm long. This should allow for the chairs to be pulled out and still be on the rug. The reason for having it under the sideboard a little is that the bottom of the rug would be in line with a doorway on the side wall so we'd want to keep that clear. Good point about the top chair being close the sideboard. I might have to wait until the furniture is in situ then measure up for the rug to allow for all those things. We rarely use that top chair anyway but I will still need to open the doors!

Look for a piece of carpet and get it edged. Ask at carpet shops to see remnants or off a new roll

Are wool rugs better than synthetic rugs?