Subjects tell the listener and the reader whom or what the sentence is about. The subject is that part of a sentence which names a person, thing, or idea. e.g. Every complete subject contains a simple subject. The simple subject, which is a noun or pronoun, is the most important word in the complete subject.
The USPS considers a postcard to be any single rectangular piece of paper that is at least 3 1/2 inches high by 5 inches long by 0.007 inch thick' and no more than 4-1/4 inches high by 6 inches long by 0.016 inches thick.. The post office considers all papers outside of these dimensions to be letters.
1 PS Form 2976-E is approximately 10-1/4 inches wide and 7-1/4 inches high. 2  The maximum size dimensions for Priority Mail International parcels vary by country and are noted in the Individual Country Listings.riority Mail International service is considered a parcel stream for mail exchange purposes, with the exception of Flat Rate Envelopes and the Small Flat Rate Priced Boxes.