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.
Large postcards can measure up to 6 ââ high, 11 Â½â long and Â¼â thick, but they cost as much as a First-Class Letter ($0.465 and up) to send. Business postcards generally have an image or call to action on the front, with space on the back for the delivery address, postage and perhaps a short message.