Are you talking about a sewing cabinet? The kind that your machine sits in, and the table surface is level with the machine's bed... and it closes up with the machine hidden inside..
If that's what you want, search for sewing cabinet, not table
and measure before buying. Not all machines fit all cabinets. Vintage machines and vintage cabinets, I can help you with, (information type help, I'm not selling any cabinets) but if it's a new machine I wouldn't have a clue except to say check out nancysnotions.com and clotilde.com for ideas and then try to find something used.
There was a thread somewhere about making your own sewing or quilting table, people were cutting a space out from a plain old desk and setting the machine down in that to make it a big flat sewing surface (bad description i know) I know there are tuts out there for table modifications.