Looks amazingly like the metal or mineral the color is named for. A modern way to convey quality and add personality, with sparkle and shimmer that stands out. And as you would expect, these “metallics” weigh in at a heavy 80 lb. stock..80 lb. Paper Weight - Two grades heavier than standard envelope paper.Usually ships same or next business day.7 1/2 x 7 1/2 Square Envelopes - Silver Metallic 50/PK.A modern way to convey quality and add personality, with sparkle and shimmer that stands out.Comes in Silver Metallic, 80lb. Text Paper.Peel & Press Sealing Method.LUX 7 1/2 x 7 1/2 Square Envelopes are perfect for invitations, announcements, greeting cards and special occasions, square envelopes create a unique look!