How thick of an envelope can you mail
The thickness of an envelope that can be mailed depends on the type of mail service and the size of the envelope. Here are some general guidelines:
USPS (United States Postal Service)
- Standard letter envelopes (up to 3.5 inches long, 6.125 inches wide, and 0.007 inch thick): Can be mailed as First-Class Mail or Priority Mail.
- Large envelopes (up to 12 inches long, 15 inches wide, and 0.75 inch thick): Can be mailed as First-Class Mail or Priority Mail, but may require additional postage.
- Flat Rate Envelopes (up to 12 inches long, 12 inches wide, and 0.75 inch thick): Can be mailed as Priority Mail Flat Rate Envelopes.
- Large Flat Rate Envelopes (up to 15 inches long, 12 inches wide, and 1 inch thick): Can be mailed as Priority Mail Large Flat Rate Envelopes.
Private Carriers (e.g., FedEx, UPS)
- FedEx: Envelopes up to 1 inch thick can be shipped as FedEx Express Saver or FedEx Ground.
- UPS: Envelopes up to 1 inch thick can be shipped as UPS Ground or UPS 3-Day Select.
General Guidelines
- For envelopes thicker than 1 inch, you may need to use a specialty mail service, such as UPS SurePost or FedEx SmartPost, which are designed for heavier and bulkier packages.
- If the envelope is too large or too thick, you may need to use a box or a specialty packaging material, such as a tube or a folder.
Important Notes
- The thickness of an envelope can affect its ability to be processed by automated mail sorting machines. Envelopes that are too thick may need to be hand-sorted, which can increase processing time and cost.
- The weight and size of an envelope can also affect its postage cost. Heavier or larger envelopes may require additional postage or special handling.
It's always a good idea to check with your local post office or private carrier for specific guidelines on envelope thickness and size, as well as any additional requirements or restrictions that may apply.