4cls mail

You're referring to the 4CLS mail system!

4CLS (Four-Class Letter System) is a postal classification system used by the United States Postal Service (USPS) to determine the cost of mailing letters and other items. The system categorizes mail into four classes based on the weight and size of the item, as well as the distance it needs to travel.

Here's a breakdown of the 4CLS system:

Class 1: First-Class Mail

• Weight: Up to 3.5 oz (99 grams)
• Size: Up to 11.5 inches (29.2 cm) long, 6.125 inches (15.6 cm) wide, and 0.25 inches (0.64 cm) thick
• Distance: Any distance within the United States
• Cost: Varies based on weight and distance

Class 2: Second-Class Mail

• Weight: Up to 3.5 oz (99 grams)
• Size: Up to 11.5 inches (29.2 cm) long, 6.125 inches (15.6 cm) wide, and 0.25 inches (0.64 cm) thick
• Distance: Any distance within the United States
• Cost: Generally lower than First-Class Mail, but varies based on weight and distance

Class 3: Third-Class Mail

• Weight: Up to 3.5 oz (99 grams)
• Size: Up to 11.5 inches (29.2 cm) long, 6.125 inches (15.6 cm) wide, and 0.25 inches (0.64 cm) thick
• Distance: Any distance within the United States
• Cost: Generally lower than Second-Class Mail, but varies based on weight and distance

Class 4: Fourth-Class Mail

• Weight: Over 3.5 oz (99 grams)
• Size: Any size
• Distance: Any distance within the United States
• Cost: Generally higher than the other classes, and varies based on weight and distance

Keep in mind that these are general guidelines, and specific rates may vary depending on the USPS's current rates and regulations.