Our Stylish all-black design of black mailers boxes, decorate with ribbons or stickers, making it the perfect gift box for birthdays, wedding parties, Valentine's day, etc. Widely Used: Black mailer boxes are ideal for mailing, packaging, and storing small items like jewelry, CDs, cosmetics, soaps, mugs, candles, etc. Meet most shipping carrier specifications, suitable for small businesses, retailers, or personal use.