http://www.htta.net/table-tennis-size/
where can i get a double return board ?
i been watching videos of return boards for table tennis tables and i looked for one but its only the size of half the table where can get one the size of the table ?
I google that, and found this
https://www.teessport.com/table-tennis-coaching-18/tsp-table-tennis-return-837.htm
Is this what you mean?
Table Tennis Instruction Chapter 3 (Table and Balls specs)