As I said, it varies from printer to printer (mine is height/top 25.4; width/right 25.2). Open your Epson Print CD software and click on the green disc (second from bottom on the left hand side). It opens the Adjust Print Position window. It will print measuring points on the cardboard disc that came with your printer. You basically just follow the instructions for centering that came with the printer...
I dont know what is wrong with I use Epson print CD s/w
If I select 118, I will have a very small white ring on the edge.
If I select 119, It will have way too much ink of the side.
I do not know how to print them properly.
I do not like to use 119 and end up with extra ink that I need to wipe off.
I am afraid that some ink will stay and somewhat, may damage optical drives. Thanks for you help.