What sizes of Postal Boxes are available?

Postal Boxes come in several different sizes. Keep in mind how much mail you think you might receive, and whether that includes packages or simply letter mail.  This will help you decide on the size that is right for your needs.

P.O. Box sizes

SizeApproximate dimensionsDescription


90 mm x 130 mm x 360 mm

Ideal for letter envelopes


140 mm x 130 mm x 350 mm

Accommodates letter, legal and large brown envelopes


290 mm x 130 mm x 360 mm

Accepts virtually all size letters, envelopes and various sized parcels


290 mm x 270 mm x 360 mm


600 mm x 280 mm x 360 mm

Container/bag service: Ideal for customers who receive large volumes of mail.

All sizes may not be available at every post office location. Please check with the post office to make sure the type of box you need is available. Find a post office