i wanna make a tennis table, table. what are the dimensions and what type of wood do i use?

i would just use some sort of hard wood aye. if you know how much wood cost can u please tell me. and if you know what the length and width are of the table?

http://www.instructables.com/id/Build-Your-Own-Ping-Pong-Table-for-under-$50/
should be 9'x5'