First class mail weight chart

Here is a weight chart for First-Class Mail in the United States:

Letters

• 1 oz (28.35 grams) or less: $0.55
• 1 oz (28.35 grams) to 2 oz (57.15 grams): $0.70
• 2 oz (57.15 grams) to 3 oz (85.95 grams): $0.85
• 3 oz (85.95 grams) to 3.5 oz (99.2 grams): $1.00
• 3.5 oz (99.2 grams) to 3.75 oz (106.5 grams): $1.15
• 3.75 oz (106.5 grams) to 4 oz (113.4 grams): $1.30

Large Envelopes (Flats)

• 1 oz (28.35 grams) or less: $0.95
• 1 oz (28.35 grams) to 2 oz (57.15 grams): $1.15
• 2 oz (57.15 grams) to 3 oz (85.95 grams): $1.30
• 3 oz (85.95 grams) to 3.5 oz (99.2 grams): $1.45
• 3.5 oz (99.2 grams) to 3.75 oz (106.5 grams): $1.60
• 3.75 oz (106.5 grams) to 4 oz (113.4 grams): $1.75

Packets and Padded Envelopes

• 1 oz (28.35 grams) or less: $1.15
• 1 oz (28.35 grams) to 2 oz (57.15 grams): $1.35
• 2 oz (57.15 grams) to 3 oz (85.95 grams): $1.55
• 3 oz (85.95 grams) to 3.5 oz (99.2 grams): $1.75
• 3.5 oz (99.2 grams) to 3.75 oz (106.5 grams): $1.95
• 3.75 oz (106.5 grams) to 4 oz (113.4 grams): $2.15

Other Items

• Postcards: $0.35
• Greeting cards: $0.55
• Catalogs: $0.95 (up to 1 oz), $1.15 (1 oz to 2 oz), etc.

Please note that these rates are subject to change, and you should always check the official USPS website or consult with a postal clerk for the most up-to-date information.