SV63136 Rev. A
6-9
Specifications • 6
Outer Envelopes
(continued)
Envelope Curl/Warp
• An envelope placed flap up on a flat surface under its own weight shall
have no corner raised more than 0.5 inch (13 mm) from the surface.
• Curl/Warp of the envelope flap shall not exceed 1/8 inch (3 mm)
measured while holding flap on flat surface at the crease line.
Letter-Sized Envelope Specifications
Parameter Minimum Value Maximum Value
Width Feeder Tower: 6.37" (162 mm)
HCEF: 8.9" (225 mm)
Feeder Tower: 10.5" (266 mm)
HCEF: 10.4" (264 mm)
Depth Feeder Tower: 3.5" (89 mm)
HCEF: 3.9" (98 mm)
6.5" (165 mm)
Throat Depth* 0.25" (6.35 mm) 1.49" (38 mm), executive 1.61"
(41 mm)
Paper Weight 18 lb. (70 gsm) 24 lb. (90 gsm)
Flap Depth 1.2" (30 mm) 2.5" (63 mm) within +/- 1/4" (35
mm) of Center
1.85" (47 mm) outside +/- 1.4"
(35 mm) off center
*See Envelope Throat Definitions in this chapter for more information.
Feeder Tower - Flat-Sized Envelope Specifications
Parameter Minimum Value Maximum Value
Width 6.37" (162 mm) 10.5" (266 mm)
Depth 6.5" (165 mm) 13" (330 mm)
Throat Depth 0.25" (6.35 mm) 1.49" (38 mm)
Paper Weight 20 lb. (80 gsm) 24 lb. (90 gsm)
Flap Depth 1.2" (30 mm) 2.5" (63 mm)
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