The Postal Service uses the word “flats” to refer to large envelopes, newsletters, and magazines. Flats must have one dimension that is greater than 6-1/8 inches high or 11 ½ inches long or ¼ inch thick.
We provide USPS shipping of parcels, such as license plates, toll tag and x-rays, up to 13 ounces at discounted rates. A flat is is a box that is regular in shape (not including tubes, rolls, etc.) so that it can be processed on automated sorting equipment, and that is too large or rigid to be a flat. 
If you would like more information about our flats services or need an estimate, please contact us.
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Summary
Service Type
Flats Services
Provider Name
QuestMark Information Management Inc,
9440 Kirby Drive,Houston,Texas-77054,
Telephone No.713-662-9022
Telephone No.713-662-9022
Area
Houston, Texas 77054
Description
The Postal Service uses the word “flats” to refer to large envelopes, newsletters, and magazines.We provide USPS shipping of parcels, such as license plates, toll tag and x-rays, up to 13 ounces at discounted rates.