Weight limit on usps first class mail

According to the United States Postal Service (USPS), the weight limit for First Class Mail is:

• For letters and cards: 3.5 ounces (99 grams)
• For flats (large envelopes and packages): 13 ounces (368 grams)

If your package weighs more than these limits, you'll need to use a different type of mail service, such as Priority Mail or Parcel Post, which have higher weight limits.

Here are the weight limits for other USPS mail services:

• Priority Mail: 70 pounds (31.8 kilograms)
• Priority Mail Express: 70 pounds (31.8 kilograms)
• Parcel Post: 70 pounds (31.8 kilograms)

Keep in mind that these weight limits apply to the total weight of the package, including the weight of the packaging materials, such as boxes, bags, and wrapping paper.

It's also important to note that USPS has specific size and shape restrictions for First Class Mail, including:

• Maximum length: 11.5 inches (29.2 cm)
• Maximum height: 6.125 inches (15.6 cm)
• Maximum thickness: 0.75 inches (1.9 cm)

If your package exceeds these size and shape restrictions, you'll need to use a different type of mail service.