What Size PO Box Should I Get?

USPS gives you different choices for PO box sizes; your choice depends on the amount and type and size of the mail you receive.

2- Select PO Box Size:

PO Box SizeDimension
PO Box Size 1 (XS)3” x 5.5” (holds up to 10 – 15 letters)

4 more rows

How big of a PO box do I need?

Small Boxes

The size for the smallest box is 3 inches by 5.5 inches. This would be appropriate if you only need your PO Box to hold normal letters. For a slight step larger, they also offer the 5-by-5.5-inch size. This would be convenient if you expect larger letters or more mail.

What if a package is too big for my PO box?

If a piece of mail is too large to fit in your personal mailbox, a carrier can leave the package at your front door or in a lobby area. If a USPS carrier attempts to deliver a package and it won’t fit in the PO box, she will retain the package at a post office until you pick it up.

What forms of ID are needed to get a PO box?

A valid driver’s license or passport are two of the most common forms of valid photo ID to purchase a post office box. If you don’t have a driver’s license, you may opt for a state nondriver’s identification card, which you can apply for at your local Department of Motor Vehicles.

What is the cost of a post office box?

How to Rent a PO Box

Box Size3 Months12 Months
X-Small (Size 1)$22$76
Small (Size 2)$32$112
Medium (Size 3)$57$198