JAM PAPER #10 Business Colored Envelopes - 4 1/8 x 9 1/2 - Assorted Colors - 150/Pack Assortment of #10 Business Envelopes: Red, Blue, Green, Purple, Orange, and Yellow Size: #10 Business (4.125 x 9.5 inches) Quantity: 150 per pack (25 per color) Envelopes are cut from smooth 24 lb. paper, and have a Straight Flap with gum closure. Very versatile envelopes; can be used for invitations, personal everyday mail, bills, invoices, statements, business memos, marketing materials, brochures, small parts, cash, coins, and much more