You need Pepakura Designer to be-able to scale it, and I think you might need to scale it, I'd personally, just add a few millimeters but I DO NOT ADVISE that, SEARCH FOR A SCALING THREAD Check your math and Double check it.
WETA PAGE 1:
FEET FIRST INTO HELL!
Edit once again:
Sorry for double posting, I have dial-up internet.
My first Scaling of Ruze's ODST helm Made me look like a Bobblehead, and I had to make the chest at total of 3 times.
I serously advise you to watch somethin when you are pepping, I am reading this topic as I'm Pep'n.
Do I have any manners:
WELCOME TO THE 405th
Right now I'm trying the Weta Odst, but another project I've put on hold is Ruze's H2 ODST you can get Ruze's off the Wiki: http://halocostuming.wikia.com/wiki/Pepakura_File_Index
I'm not a master by any standards but I know somewhat what I'm doing.
EDITED to directly answer the question...