Heavyweight Bright White A8 Envelopes- 100 Envelopes - 5 1/2" x 8 1/8" - Made from 70lb Text A8 Envelopes for 5 1/4" x 8" Cards -- Does NOT fit half sheet size (5 1/2" x 8 1/2") Measures 5 1/2" x 8 1/8" Made from a High Quality 28lb Bond Bright White Stock Inkjet & Laser Printer Compatible 100 Envelopes per pack