fits the dimensions for a flat, but is not flexible, or is too lumpy.more than ¾ inches thick (except more than 1¼ thick for Periodical Class nonmachinable pieces) or,.longer than 15 inches on its longer side or,.longer than 12 inches on its shorter side or,.The thickness may not vary more than ¼" except within 1" of the edges.Ī parcel is an envelope, carton, tube, or anything else that fits ANY one of the following: For example, a carton, hard-bound book, or an envelope with contents that cannot bend is a "parcel" even if it fits the dimensions for a flat. be flexible enough to go through postal sorting equipment.To be classified as a flat, a mail piece must also: ** 1¼ inches for Periodical Class nonmachinable pieces. no more than 15 inches on its longer side and,.no more than 12 inches on its shorter side and,.
– Oversized piece standouts in the mail and sets your firm apart from others Sometimes called deluxe or oversized, this attention getting size provides plenty of space to highlight your message, offer and call-to-action and still have room for images and information about your product, brand and company. This post shares what we’ve learned from years of both testing and anecdotal experience. In practice, testing is not always practical and/or “best” may be subjective, particularly if you have broad marketing objectives. The “best” postcard size, in strict ROI terms, requires testing campaigns to determine which provides you the highest return on your investment.