We use this: https://www.amazon.com/Flash-Furniture-Granite-Folding-Playing/dp/B078XXS3XZ/ref=sr_1_4?dchild=1&keywords=mahjong+table&qid=1593415081&sr=8-4

I think I bought it for $45 couple years back. Seems to have gotten more expensive but its $60 right now.

We play 13-tiles with chinese set and it fits good enough.