This detail was just posted this morning on the USPS web site on the January 19, 2012 release of the Aloha Shirts Stamps.

What I find interesting is that:
1. The stamps are being printed in both sheet (300 million) and coil (1 billion) formats.
2. The stamps are going to have minor differences in size:
Quote:
Sheet Variety:
Image Area (w x h): 0.73 x 0.84 in./18.54 x 21.34 mm
Overall Size (w x h): 0.87 x 0.98 in./22.10 x 24.89 mm
Coil Variety:
Image Area (w x h): .72 x .84 in./18.29 x 21.34 mm
Overall Size (w x h): .880 x .96 in./22.35x 24.38 mm
3. The printing method is different (Gravure for sheet stamp; Offset for coil stamp).
4. Different printers are involved in the sheet (AVR) versus coil (SSP) varieties.
5. Only the coil variety (according to these specs) are going to have USPS microprinting.
6. The colors used in the printing process will be different:
Quote:
Sheet Variety Colors: Yellow, Magenta, Cyan, Black, 484 (Red), 174 (Brown), 716 (Orange)
Coil Variety Colors: Cyan, Magenta, Yellow, Black, PMS 174 (Brown), PMS 716 (Orange), Beige
6. Not sure about the plate numbers on the sheet variety, as this is exactly as taken from the USPS web site (which is obviously in error):
Quote:
Plate Numbers: "V" followed by five (7) single digits
Anyway, here are the technical details as provided by the USPS:
Quote:
Sheet version:
Issue: Aloha Shirts
Item Number: 115100
Denomination: 32-cent
Type of Issue: Definitive
Stamp Format: Sheet
Stamp Count: 20
Design Count: 5
Series: N/A
Issue Date: January 19, 2012
Issue City: Honolulu, HI 96820
Designer: Carl T. Herrman, North Las Vegas, NV
Art Director: Carl T. Herrman, North Las Vegas, NV
Typographer: Carl T. Herrman, North Las Vegas, NV
Exising Photos: Ric Noyle
Engraver: Trident
Modeler: Avery Dennison, Designed and Engineered Solutions
Manufacturing Process: Gravure
Printer: Avery Dennison (AVR)
Printed at: AVR, Clinton, SC
Press Type: Dia Nippon Kiko (DNK)
Stamps per Sheet: 20
Print Quantity: 300 million stamps
Paper Type: Prephosphored, Type I
Adhesive Type: Pressure-sensitive
Processed at: AVR, Clinton, SC
Colors: Yellow, Magenta, Cyan, Black, 484 (Red), 174 (Brown), 716 (Orange)
Stamp Orientation: Vertical
Image Area (w x h): 0.73 x 0.84 in./18.54 x 21.34 mm
Overall Size (w x h): 0.87 x 0.98 in./22.10 x 24.89 mm
Full Sheet Size (w x h): 5.25 x 4.83 in./133.35 x 122.68 mm
Plate Size: 420 stamps per revolution
Plate Numbers: "V" followed by five (7) single digits
Marginal Markings:
Front: Plate numbers in four corners of sheet
Back: ©2011 USPS • USPS Logo • Plate position diagram • Barcode (115100) in upper right and lower left corner of sheet • Promotional text lower left hand corner
Quote:
Coil Version:
Issue: Aloha Shirts
Item Number: 788800
Denomination: 32-cent
Type of Issue: Definitive
Format: Roll of 100 (5 designs)
Series: N/A
Issue Date & City: January 19, 2012, Honolulu, HI 96820
Designer: Carl T. Herrman, North Las Vegas, NV
Art Director: Carl T. Herrman, North Las Vegas, NV
Typographer: Carl T. Herrman, North Las Vegas, NV
Existing Photo: Ric Noyle
Modeler: Donald Woo
Manufacturing Process: Offset/Microprint "USPS"
Engraver: N/A
Printer: Banknote Corporation of America, Inc./SSP
Printed at: Browns Summit, N.C.
Press Type: Alprinta, 74
Stamps per Roll: 100
Print Quantity: 1 billion stamps
Paper Type: Prehosphored, Type II
Adhesive Type: Self-adhesive
Processed at: Unique Binders, Fredericksburg, VA
Stamp Orientation: Vertical
Image Area (w x h): .72 x .84 in./18.29 x 21.34 mm
Overall Size (w x h): .880 x .96 in./22.35x 24.38 mm
Colors: Cyan, Magenta, Yellow, Black, PMS 174 (Brown), PMS 716 (Orange), Beige
Full Sheet Size (w x h): N/A
Plate Size: 625 stamps per revolution
Plate Numbers: "S" followed by seven (7) single digits
Marginal Markings: Plate block numbers every 25th stamp