![I sell jewelry and have always mailed with USPS first class. I got this mail returned to me today and have no idea what went wrong. I never had an issue before. I sell jewelry and have always mailed with USPS first class. I got this mail returned to me today and have no idea what went wrong. I never had an issue before.](https://preview.redd.it/i-sell-jewelry-and-have-always-mailed-with-usps-first-class-v0-ab4z1r36j4aa1.jpg?auto=webp&s=1a3841820610c7a48cb46c3a6163cd608d08ff9c)
I sell jewelry and have always mailed with USPS first class. I got this mail returned to me today and have no idea what went wrong. I never had an issue before.
![Quality Park Survivor Tyvek First Class Envelopes First Class Mail - #15 1/2 - 12" Width x 15 1/2" Length - 14 lb - Peel & Seal - Tyvek - 100 / Box - White - Walmart.com Quality Park Survivor Tyvek First Class Envelopes First Class Mail - #15 1/2 - 12" Width x 15 1/2" Length - 14 lb - Peel & Seal - Tyvek - 100 / Box - White - Walmart.com](https://i5.walmartimages.com/asr/047eb903-845c-46b4-a676-3a84bcfab2da.70db2cbff982cd134fe4bf2b1591b7f9.jpeg?odnHeight=768&odnWidth=768&odnBg=FFFFFF)
Quality Park Survivor Tyvek First Class Envelopes First Class Mail - #15 1/2 - 12" Width x 15 1/2" Length - 14 lb - Peel & Seal - Tyvek - 100 / Box - White - Walmart.com
![Amazon.com : 25-Pack Stay Flat Rigid Mailers 9x11.5 with Self Adhesive Seal, 450 gsm Sturdy Bulk Brown Cardboard Envelopes for Shipping Photos, Magazines, Comic Books, Art Prints, Documents, Collectibles : Office Products Amazon.com : 25-Pack Stay Flat Rigid Mailers 9x11.5 with Self Adhesive Seal, 450 gsm Sturdy Bulk Brown Cardboard Envelopes for Shipping Photos, Magazines, Comic Books, Art Prints, Documents, Collectibles : Office Products](https://m.media-amazon.com/images/I/61q+PcNdIkL.jpg)
Amazon.com : 25-Pack Stay Flat Rigid Mailers 9x11.5 with Self Adhesive Seal, 450 gsm Sturdy Bulk Brown Cardboard Envelopes for Shipping Photos, Magazines, Comic Books, Art Prints, Documents, Collectibles : Office Products
![USPS First Class Template Size Guide Ruler Measuring Tool Postal Slot Gauge Large Envelope Shipping Tool - Etsy USPS First Class Template Size Guide Ruler Measuring Tool Postal Slot Gauge Large Envelope Shipping Tool - Etsy](https://i.etsystatic.com/34059611/r/il/17b77b/3661838477/il_570xN.3661838477_tr8n.jpg)
USPS First Class Template Size Guide Ruler Measuring Tool Postal Slot Gauge Large Envelope Shipping Tool - Etsy
![USPS First Class Template Size Guide Ruler Measuring Tool Postal Slot Gauge Large Envelope Shipping Tool - Etsy USPS First Class Template Size Guide Ruler Measuring Tool Postal Slot Gauge Large Envelope Shipping Tool - Etsy](https://i.etsystatic.com/34059611/r/il/51c54d/3661838555/il_340x270.3661838555_td1z.jpg)
USPS First Class Template Size Guide Ruler Measuring Tool Postal Slot Gauge Large Envelope Shipping Tool - Etsy
![Amazon.com : CARDBRICK MAILERS for 12x18”, 11x17” Photos, Posters, and Documents. Pack of 10. Cardboard Rigid Mailers. Heavy Duty No Bend Protection Shipping Envelopes. Lightweight Shippers for Reduced Postage. : Office Products Amazon.com : CARDBRICK MAILERS for 12x18”, 11x17” Photos, Posters, and Documents. Pack of 10. Cardboard Rigid Mailers. Heavy Duty No Bend Protection Shipping Envelopes. Lightweight Shippers for Reduced Postage. : Office Products](https://m.media-amazon.com/images/I/71QcMSzj53L.jpg)
Amazon.com : CARDBRICK MAILERS for 12x18”, 11x17” Photos, Posters, and Documents. Pack of 10. Cardboard Rigid Mailers. Heavy Duty No Bend Protection Shipping Envelopes. Lightweight Shippers for Reduced Postage. : Office Products
![Amazon.com : PSBM Rigid Mailers, 6x6 Inch, 400 Pack, Kraft White Cardboard Shipping Envelopes for Photo & Document, Self Seal : Office Products Amazon.com : PSBM Rigid Mailers, 6x6 Inch, 400 Pack, Kraft White Cardboard Shipping Envelopes for Photo & Document, Self Seal : Office Products](https://m.media-amazon.com/images/I/41iufljH1mL._AC_UF894,1000_QL80_.jpg)