Unfortunately, bathroom ventilation fans often are set up so that they exhaust air to the space between ceiling joists, especially if the bath is located on a lower level toward the middle of the house.
The United States Postal Service defines a postcard as: rectangular, at least 3 1â2 inches (88.9 mm) high Ã 5 inches (127 mm) long Ã 0.007 inches (0.178 mm) thick and no more than 4 1â4 inches (108 mm) high Ã 6 inches (152.4 mm) long Ã 0.016 inches (0.406 mm) thick.
Standard Postcard Sizes: Postage and Requirements. Standard Postcard - a standard postcard mails First Class at current rate of 34Â¢. Standard Postcard Sizes - minimum is 3Â½â³ x 5â³. - maximum size is 4Â¼â³ x 6â³ for mailing at the 34Â¢ rate. Paper Thickness - must be at least 0.007â³ and not more than 0.016â³ in thickness.