I have not seen sink grids before - is this what you mean? If it was 1 inch too small all around, i think it would shuffle a bit but it is unlikely you would notice it much. And if it didn't have some gap, it would scrape as you took it in and out. Hope this helps!

If behind doors, I would be looking at my budget and deciding from that.

My sister had a lovely round ceramic trough/basin

@wuff, Thank you so much, and congratulation for your renovation, I wish you will enjoy it for so many years to come. Yes, I agree living into a granny flat next to my son was my husband wish before he passed away. It is good to be close to family. Also I love the suburb which I have been lived in for 22 years. My Daughter and her family is living close by too. Most of my close friends are living around and we always gather for a brunch, or lunch or watch movies. The good thing is most of my friends pick me up and don't let me drive most of the time when we go out. Thank you again