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Table 10. Usable Envelope Sizes
Envelope Type Size
Chou 3 120mm x 235mm
Chou 4
90mm×205mm
Chou 40 90mm×225mm
You 0 235mm x 120mm
You 2(C6) 162mm x 114mm
You 4 235mm x 105mm
YouChou 3 120mm x 235mm
Kaku 2 240mm x 332mm
Kaku 3 216mm x 277mm
Kaku 6 162mm x 229mm
Kaku 8 119mm x 197mm
C4 324mm x 229mm 12.76” x 9.02”
C5 229mm x 162mm 9.02” x 6.38”
DL 220 mm x 110 mm 8.66” x 4.33”
COM-9 225.4mm x 98.4mm 8.875” x 3.875 “
COM-10 241.3mm x 104.8mm 9.50” x 4.125”
Monarch 190.5mm x 98.4mm 7.5” x 3.875”
Kaku 2
Chou 3, Chou 4, Chou 40
Kaku 3, Kaku 6, Kaku 8
You 0, You 2, You 4,
Chou You3
COM-9,COM-10,
DL, C4, C5, Monarch
Figure 4. Envelope Orientations
The following envelopes should not be used:
• Too-thick or plastic envelopes;
• Double envelopes, which have an inner envelope;
• Envelopes with fastening metal, buttons or windows;
• Envelopes having flaps backed with an adhesive or double-faced tape;
• Creased or warped envelopes;
• Envelopes with stamps; or
• Matte-finished or embossed envelopes.
Note 1) Envelopes may become warped or creased after they are printed.
Note 2) A thin film of toner may be printed over envelopes, or images printed on labels
may be lighter than those user-specified.
Note 3) Envelopes may lower the fusibility of toner.
Note 4) Output print quality may degrade within approximately 5 mm of an envelope
joint (a thickness change line).
Note 5) The printer may feed envelopes with thick folds improperly..
Note 6) Pro9541WT is not supported Envelopes.