I made this because people kept stepping on the drain filters I buy in the shop and they crack.
The central part that goes down into the drain is about 4 cm diameter at the top and 3½ cm diameter at the bottom.
Update: I've accidentally trodden on it a few times and it has bent, until I got off it again, and has not cracked.
8.058 w x
8.058 d x
3.172 w x
3.172 d x