Sizes: A-1 (3.625" x 5.125") Invitation A-2 (4.375" x 5.75") Announcement A-4 (4.25" x 6.25") Invitation A-6 (4.75" x 6.5") Announcement A-7 (5.25" x 7.25") Announcement 3.625" x 6.5" Remittance - Short Flap 3.625" x 6.5" Remittance - Long Flap #9 (3.875" x 8.875" ) Commercial with Window #9 (3.875" x 8.875" ) Commercial #10 (4.125" x 9.5") Standard with Window #10 (4.125" x 9.5") Standard #10 (4.125" x 9.5") Universal 6" x 9" Horizontal Booklet 6" x 9" Vertical Catalog 6.5" x 9.5" Horizontal Booklet 6.5" x 9.5" Vertical Catalog 9" x 12" Horizontal Booklet 9" x 12" Vertical Catalog 10" x 13" Horizontal Booklet 10" x 13" Vertical Catalog Paper Stocks: 70 lb. Opaque Smooth White