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.
You may think that your mailpiece is a postcard, because it is a single sheet of paper. 1  But to qualify for mailing at the First-Class Mail postcard price, it must be: 2  Rectangular. 3  At least 3-1/2 inches high x 5 inches long x 0.007 inch thick. 4  No more than 4-1/4 inches high x 6 inches long x 0.016 inches thick.