Tothill

I need some pointers on sizes for table toppers and runners.

I have a narrow rectangular table. 31x47 with two 17.5 inch extensions. Should I make runners in 3 different sizes to accommodate the 3 possible lengths of the table?

We eat all our meals at it.

I made one runner for it, but it was way too wide, I did not have room to set the table when it was on the table. Or it the idea to remove the runner before setting the table?

I have a few questions around size.

Should a runner hang off the end of the table to just cover the centre?

Is their a standard ratio for the size of a table runner compared to the size of the table?

What about table toppers for round tables? My mum and mil have round tables. Is their a ratio for toppers?

I do not have resources (time and money) to do a bunch of trial runs to see what works best.

Thank you for any help you can offer.