First Class Mail Flat

First Class Mail Flat. Anything you send to customers including bills invoices correspondences and merchandise can be sent via First-Class as long as your letters weigh less than 35. First-Class Package Service-Retail Parcel.

First Class must be shipped in your own packaging and must weigh less than 13 oz when packaged up. If you use the free shipping materials from the Post Office you need to pay the proper postage for using those materials. Free Results 247 For You.

First-Class Mail Flat Large Envelope First ounce is 100.

Maximum weight for First-Class Mail letters is 35 oz. But keep in mind that weight usually affects price the higher the weight the higher the postage especially for First-Class Mail. Ad Email Extractor Email Finder Email Hunter Find Email Address Email Spider 24x7 Support. Large Envelopes exceed one or more of the letter size maximum dimensions.