Rural mailbox height

Here’s our mailbox dimensions resource guide, including the standard large, medium, and small USPS box sizes, brick designs, and installation measurements.

Mailboxes can come in a wide range of shapes and sizes.

Residential mailbox regulations

This is why it can be challenging to know exactly what’s right for you. Whether you need a larger postal box for your orders and packages for your business, you need to replace your old postal box, or you want to install your first one, it’s important to get the right size to fit your needs.

Standard Mailbox Dimensions

Every mailbox in the United States must be approved by the standards of the United States Postal Service (USPS). T1 or C1 size (small mailbox) is about 5″ wide and 6″ tall and 18 ½” long.

Then, there is T2 or C2, which is about 6″ wide by 7″tall and 19″ long (medium).

Finally is the T3 or C3 size (large) which is about 8″ wide by 11 ½” tall and 22 ½” long. (T means traditional, and C stands for contemporary.)

Large Mailbox Size

Residential property owners can still use large

how high does my mailbox need to be

how high does your mailbox need to be off the ground