: Choose from five standard sizes based on your mail volume and a rental period of 3, 6, or 12 months .
Note: Social Security cards, birth certificates, and credit cards are accepted. PO Box Sizes & Estimated Costs
To finalize your rental and get your keys, you must provide : one with a photo and one that verifies your physical address.
: Even if you apply online, you must visit the Post Office within 30 days to present two forms of valid ID and collect your keys. Required Identification
Prices vary significantly by location (urban vs. rural) and are subject to change. Dimensions (Approx.) Est. Monthly Price 10–15 letters or 2 rolled magazines Size 2 (S) 15–20 letters or 5 rolled magazines Size 3 (M) 11" x 5.5" Large envelopes stacked flat Size 4 (L) Two small shoe boxes + letters Size 5 (XL) 22.5" x 12" Largest parcels and flat rate boxes $21–$115 PO Boxes - USPS