How to merge different sized PDFs into one PDF keeping original sizes

My boss needs to merge 3 PDF files (2 are 8 1/2 x 11 and 1 is legal) into a single PDF, and when THAT new PDF is sent out and printed, he wants them come out as original sized PDF's ie: 2 - 8 1/2x11 and 1 legal.  

As I try this now, I combine all 3 sheets, and Adobe re sizes the legal and minimizes the whole sheet to fit on an 8 1/2 x 11 sheet.

We are both using the same Adobe version, 9 pro

Can this be done?
GershowitAsked:
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APNFSSCCommented:
if you used the combine tool... then try opening up the first pdf and then from the document menu choose insert pages then from file.

See how that goes for you.
captainCommented:
You may also want to check that the Paper scaling options in the Print dialog are not set to 'Shrink to Printable area'

hth
capt.
Brian GeeCommented:
I just tested this, and Adobe retains the page sizes, but it may not be readily apparent... go to File > Print. Change Page Scaling to None and you should see the page sizes should remain intact when you scroll using the preview scroll.

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captainCommented:
;o)
GershowitAuthor Commented:
Thanks, that is exactly what was "wrong"
captainCommented:
Indeed and that is what I posted above, hence the ;o)

capt.

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