I need to print 300-400 label with Nearly fix text.

problem:

1) Label size is 2 x 5 Inch, with two sides, i.e. 12 x 6 Inch Paper size but I find that the after assigning the size, it does not fit!
2) as paper is 6 Inch, Adjustment middle will cause wrong adjust...
3) how to print 300 or cust-define number of label. Using _pcopies need to concern formfeed problem.
4) how to skip any formfeed problem on label??

Thanks