JAM PAPER #10 Business Premium Envelopes - 4 1/8 x 9 1/2 - Presidential Blue - 50/Pack Color: Presidential Blue Size: #10 (4.13 x 9.5 inches) Quantity: 50 Envelopes per Pack These envelopes are made from 28 lb paper with a textured finish. Very versatile envelopes; can be used for invitations, personal everyday mail, bills, invoices, statements, business memos, marketing materials, brochures and much more