5 1/2 x 5 1/2 Square Envelopes 50/Pack, 80lb. Bright White (8515-80W-50) | LUX Cheap

Actual manufacturer name for the color of the product.

Paper weight, stated in pounds (lbs.), is calculated by weighing a ream (500 sheets) of the basis size (master uncut size) of that paper type. For example, the basis size of bond paper is 17″ x 22″ with a ream weighing 20lbs; the basis size of watercolor paper is 22″ x 30″ with a ream weighing 140 lbs.

Describes the location and number of windows built into the envelope. Windows are typically used to show an address that is printed on the contents of the document.