JAM PAPER #10 Policy Business Colored Envelopes - 4 1/8 x 9 1/2 - Blue Recycled - 25/Pack Color: Blue Size: #10 (4.13 x 9.5 inches) Quantity: 25 envelopes per pack Very versatile envelopes; can be used for invitations, personal everyday mail, bills, invoices, statements, business memos, marketing materials, brochures and much more Perfect for business needs.