| Package weight and size Package weight Enter the overall weight of the item plus the weight of the packaging material. Use a shipping scale for accuracy (not a bathroom or other type of scale). If you don't have a scale, below are some common items to help you estimate the weight. Package Size 
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A letter ranges between: Minimum: 5" long, 3½" high and 0.007" thick. Maximum: 11½" long, 6 1/8" high and 1/4" thick.
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| | Large Envelope
A Large Envelope ranges between:
Minimum: 11½" long, 6 1/8" high, and ¼" thick. Maximum: 15" long, 12" high, ¾" thick.
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USPS Flat Rate Envelope
These are special envelopes provided by the US Postal Service for use with Priority Mail. The rate stays the same no matter what the item weighs.
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UPS Letter
These are special letters provided by UPS for use with UPS Next Day Air Saver and UPS 2nd Day Air. They are for letters, correspondence, and electronic media. The rate is not based on the weight of the shipment.
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Package (including Thick Envelope)
A package is a parcel (or box) less than 84" when you add the length + girth. Length is the longest side of a package. Girth is the distance if you wrapped a string around the 2 smaller sides of a package. A Thick Envelope is a large envelope exceeding ¾" thickness.
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Large Package (Oversize 1)
A Large Package is a parcel where the length plus girth is over 84" and less than or equal to 108". Length is the longest side of a package. Girth is the distance if you wrapped a string around the 2 smaller sides of a package.
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Very Large Package (Oversize 2)
An Oversized Package is a parcel where the length plus girth is over 108" and less than or equal to 130". Length is the longest side of a package. Girth is the distance if you wrapped a string around the 2 smaller sides of a package.
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To help you determine if your package dimensions are within UPS size limits, a 130-inch chain is available upon request by calling 1-800-PICK-UPS. Dimensions The length, width and height of your package in inches are required for US Postal Service Priority Mail Express and UPS Air Services (Next Day Air, 2nd Day Air, 3 Day Select), and may affect the shipping cost. You may need package dimensions for other shipping services as well.
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