Envelopes:

•   Number 10, letter-size envelopes must be used.

•   Window envelopes require production testing.

•   Envelope flap size should be between 1-1/4” and 2-1/4”.

•   Minimum Paper Weight:  Basis weight of 50 lbs.

Enclosures:

•   Minimum Size: 6” (L) x 4” (W)

•   Maximum Size:  9-7/8” (L) x 6” (W)

•   Thickness: 1/2”

•   Clearance:  1/4” from top of envelope throat to insure flap closure; 1/2’” inside      envelope from side- to-side to ensure a smooth fit.

•   Minimum Paper Weight:  Basis weight of 25 lbs.

•   For up to five enclosures, each item (including the envelope) must not weigh more      than 2 oz.

Paper Fold:

•   Machine pre-fold all material (you may use our folding services).

•   Inserts require letter fold (not accordion).

•   Inserts must be folded separately (not collated).