What size letters can you mail
The United States Postal Service (USPS) has specific guidelines for mailing letters and packages. Here are the standard sizes for letters that can be mailed:
Letters:
- Minimum size: 3.5 inches (8.9 cm) high x 6.125 inches (15.6 cm) long x 0.007 inch (0.18 mm) thick
- Maximum size: 11.5 inches (29.2 cm) high x 6.125 inches (15.6 cm) long x 0.25 inch (6.4 mm) thick
Postcards:
- Minimum size: 3.5 inches (8.9 cm) high x 5 inches (12.7 cm) long
- Maximum size: 4.25 inches (10.8 cm) high x 6 inches (15.2 cm) long
Large Envelopes (Flats):
- Minimum size: 6.125 inches (15.6 cm) high x 11.5 inches (29.2 cm) long
- Maximum size: 12 inches (30.5 cm) high x 15 inches (38.1 cm) long
Special Size Letters:
- Square envelopes (e.g., for sending photos): 3.5 inches (8.9 cm) per side
- Long, thin envelopes (e.g., for sending documents): 3.5 inches (8.9 cm) high x 12 inches (30.5 cm) long
Keep in mind that these are general guidelines, and some special sizes may be allowed for specific types of mail, such as:
- Certified Mail: 11.5 inches (29.2 cm) high x 15 inches (38.1 cm) long
- Registered Mail: 12 inches (30.5 cm) high x 16 inches (40.6 cm) long
It's always a good idea to check with your local post office or the USPS website for specific guidelines on mailing sizes and requirements.