Standard Envelope Sizes

measurements in inches

#10 Regular or Window : 9.5 x 4.125
#9 Regular or Window : 8.875 x 3.875
#6 3/4 Business Reply : 6.50 x 3.625
Small Catalog or Booklet : 6 x 9
Large Catalog or Booklet : 9 x 12 or 10 x 13
A-1 Invitation : 3.625 x 5.125
A-2 Invitation : 4.375 x 5.75
A-6 Invitation : 4.75 x 6.5
A-7 Invitation : 5.25 x 7.25
A-8 Invitation : 5.50 x 8.125
A-9 Invitation : 5.75 x 8.75
A-10 Invitation : 6 x 9.50