No 10 (4-1/8-x-9-1/2) - in Specialties: Window; Content Fiber: 25% Cotton/30% Recycled - Letter envelope choices are here

#10 Poly Window Envelopes (4.125x9.5) 24W Capitol Bond (Perfect Laser) Bright White - 2500 PK
CB-7047000-C
PR

$427.05
#10 Poly Window Envelopes (4.125x9.5) ATLAS Bond 25% Cotton 24W Ultra Bright White (Imaging) - 2500 PK
AB-7046700-C
PR

$428.55
#10 Poly Window Envelopes (4.125x9.5) ATLAS Bond 25% Cotton 24W Ultra Bright White (Light Cockle) - 2500 PK
AB-5656600-C
PR

$428.55
#10 Commercial Canadian Window Envelopes (4.125x9.5) ATLAS Bond 25% Cotton 24W Ultra Bright White (Imaging) - 2500 PK
AB-8000805-C
PR

$649.20
#10 Commercial Canadian Window Envelopes (4.125x9.5) ATLAS Bond 25% Cotton 24W Ultra Bright White (Light Cockle) - 2500 PK
AB-8000818-C
PR

$649.20
#10 Poly Window Envelopes (4.125x9.5) 24W Capitol Bond (Light Cockle) Bright White - 2500 PK
CB-5673100-C
PR

$419.30
#10 Commercial Canadian Window Envelopes (4.125x9.5) 24W Capitol Bond (Light Cockle) Bright White - 2500 PK
CB-8000854-C
PR

$640.05
#10 Commercial Canadian Window Envelopes (4.125x9.5) 24W Capitol Bond (Perfect Laser) Bright White - 2500 PK
CB-8000882-C
PR

$647.60