As we were talking that the cost of the postage of the large envelope of size like 9×12 has changed. So the postage required for an 8 … $8. An envelope that doesn't exceed these dimensions and weighs one ounce or less will require only a single First Class postage … Padded Flat-Rate Envelope. Envelopes used for flat mail cannot be more than ¾″ thick, 12″ high, 15″ long or weigh more than 13 ounces. Bring the 9-inch by 12-inch envelope to the post office so it can be weighed on a postal weight scale to determine postage needed. NEW FOR 2020 First-Class Mail prices for letters, flats, and Packages. that need to be delivered in 1 to 3 business days. $8.40. The first ounce of a 9×12 envelope should use two Forever Stamps (equivalent to $1). Padded Flat Rate Envelope 12 1/2 x 9 $26.95 $23.25 $3.70 2020 USPS® Postage Rate Guide Effective January 26, 2020 1 First-Class Mail® Use First-Class Mail for lightweight letters up to 3.5 oz. U.S. The USPS ® site contains the current physical standards and sizes for letters, parcels, and flats. Any envelope larger than the maximum dimensions for a United States postal letter (6 1/8 inches high, 11 1/2 inches long and 1/4 inch thick) requires extra postage. This is a large envelope, the maximum size that a large envelope can be is: 15" x 11 1/2" (The maximum thickness of a large envelope is 3/4") This table shows the postage rates for sending a large envelope. The USPS considers any envelope bigger than this size to be a package, and will be subject to parcel prices. USPS Postage Price Calculator is a free online tool that allows you: Calculate Postcard price; View Flat Rate Envelopes; View Flat Rate Boxes; Calculate price based on Shape and Size . The words large envelopes and flats are used interchangeably. When you use Priority Mail ® Flat Rate Boxes and Envelopes, and Priority Mail Express ® Flat Rate Envelopes, there's virtually no weighing. Send Mail & Packages Convenient Domestic Shipping. However, if the item is stiff, more forever postage may be needed, because unbendable items and items that are thick but still light (i.e., has a styrofoam filler) must go as first class parcel. Use Click-N-Ship ® service to pay for postage and print a shipping label from your printer or at a Post Office ™ location. 500 sheets of 8½"x11" 20 lbs paper = 4 lbs 14 oz Average coffee mug = 10 oz Box of business cards = 9.5 oz Eyeglasses and case = 4 oz CD and case = 2.8 oz Flash drive = 0.4 oz ... Legal Flat-Rate Envelope. At this writing, the postage rate for flats is $1.00 for the first ounce, and $0.21 for each additional ounce. What's the Date you plan to mail the item? Plus, you can schedule a USPS ® pickup from your home or office. Whatever you call them, flats must: Have one dimension that is greater than … Sizes for Large Envelopes and Flats. Besides, you have to pay the extra stamps for each additional ounce equivalent to $0.20. and flats up to 13 oz. Want to save time and ship from home? USPS classifies a 9" x 12" envelope as a "flat." 1. Tips Many post offices have self-serve areas available 24 hours per day that allow you to weigh and purchase postage for a 9-inch by 12-inch envelope … … What's the Time you plan to mail the item? The Postal Service has some of the lowest letter mail postage rates in the industrialized world and also continues to offer a great value in shipping. $7.65. The Postal Service uses the word "flats" to refer to large envelopes, newsletters, and magazines. Postal Service Announces New Prices for 2020 . $8.05. Pricing depends on the weight of the envelope with prices starting at $1.00 increasing by $0.20 for each additional ounce.